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Etymology of "jacking off"?

Bondi Beach ๐Ÿšซ

From "Word of the day"
Feb 21, 2025

jactation

PRONUNCIATION:
(jak-TAY-shuhn)

MEANING:
noun:
1. Boasting.
2. Involuntary bodily movements, such as tossing or twitching.

ETYMOLOGY:
From Latin jactation (tossing, boasting), from jactare (to throw, boast), frequentative of jacere (to throw). Earliest documented use: 1576. Also spelled as jactitation.

USAGE:
"The girls from the legal pools and the courthouse clerks stood out on the sidewalks [and] engaged in conceited jactation ... Most of the talk had little to do with actual facts."
Patricia Hickman; Katrina's Wings; Five Star; 2002.

awnlee jawking ๐Ÿšซ

@Bondi Beach

jactation

My COD dictionary lists 'jactitation' as an expressive expansion of the older 'jactation' (which isn't listed) from the Latin 'jactare', to throw. Google returns both - a Ngram would be interesting. The game of 'jacks' might originate from 'jactare' since it involves throwing.

My COD doesn't give an etymology for 'jacking off' but I suspect it has different origins. 'Jilling off' isn't even listed. :-(

AJ

Replies:   Vincent Berg
Vincent Berg ๐Ÿšซ

@awnlee jawking

Another useful site for these sorts of questions is urbandictionary.com (at least for U.S. based slang terms), because few library will list anything that's not a standard dictionary usage (i.e. recognized as an official definition).

DarkKnight ๐Ÿšซ

@Bondi Beach

Anybody ever try to jack on? I think some people do it when they hunker up during a storm.

I'm having a weird day.

Bondi Beach ๐Ÿšซ

@DarkKnight

Anybody ever try to jack on?

When "on" is transitive, yes.

~ JBB

Dominions Son ๐Ÿšซ

@DarkKnight

Anybody ever try to jack on?

Anyone whose had a flat tire on their car?

Replies:   Vincent Berg
Vincent Berg ๐Ÿšซ

@Dominions Son

Anyone whose had a flat tire on their car?

Technically, that's 'jack up', not 'jack on', as frankly, I've never heard anyone use the term 'jack on' in normal speech, as it not a normal speech pattern (common term).

Replies:   Dominions Son  palamedes
Dominions Son ๐Ÿšซ

@Vincent Berg

Technically, that's 'jack up', not 'jack on', as frankly

Before you can jack the car up, the jack has to be connected to the car. That could kind of be considered putting the jack on the car.

Replies:   madnige
madnige ๐Ÿšซ
Updated:

@Dominions Son

I know you're always right (and in conflict with reality, see rule 1, however thinly you have to slice reality), but generally, when I jack a car up, I first put the jack under the car.

Replies:   Dominions Son
Dominions Son ๐Ÿšซ

@madnige

Sense of humor check....Error: No sense of humor detected.

Replies:   DarkKnight  madnige
DarkKnight ๐Ÿšซ

@Dominions Son

Roger that. I should have known posting something frivolous like that here would result in a lot of extraneous comments.

madnige ๐Ÿšซ

@Dominions Son

Error: No sense of humor detected.

LOL!

palamedes ๐Ÿšซ

@Vincent Berg

Technically, that's 'jack up', not 'jack on', as frankly, I've never heard anyone use the term 'jack on' in normal speech, as it not a normal speech pattern (common term).

As you said not normal but when we raise new steel silos we build the roof on the ground and use jacks to raise and suspend it in the air then you build a ring (wall). Raise it up add another ring till you reach the height you want.

My point is that we call out Jacks on when we power the jacks and we do this for safety as there is great potential for injury or death.

Just imagine all this nice raw edge sheet metal and you cut, shear, or pull off a pneumatic or Hydraulic line to power the jacks or even more dangerous you have electric jacks and the power cord is damaged in a building the is nothing but metal.

So yes in this we do call out

Jacks On
Jacks On
Jacks On

(then you call out)

Lifting

(once at the height needed)

Jacks Locked

and save for the fact that the jacks are holding how ever big/high building in the air things are safe

wink ;) wink ;)

awnlee jawking ๐Ÿšซ

@DarkKnight

Anybody ever try to jack on?

Some people have tried to jack on ory. Now that's telling a story :-)

AJ

Switch Blayde ๐Ÿšซ
Updated:

@Bondi Beach

From https://www.etymonline.com/word/jerk%20off
jerk off (v.)
slang, "perform male masturbation," by 1896, from jerk (v.) denoting rapid pulling motion + off (adv.). Compare come off "experience orgasm" (17c.). Farmer and Henley ("Slang and Its Analogues") also lists as synonyms jerk (one's) jelly and jerk (one's) juice. The noun jerk off or jerkoff as an emphatic form of jerk (n.2) is attested by 1968. As an adjective from 1957.

But I like this one:

"Jacking" alluded to the old car bumper jacks that jerkily moved up, like a guy's penis does as he gets an erection and it jerkily rises up. So jacking off is likely more used by us older guys.

richardshagrin ๐Ÿšซ

@Bondi Beach

Jack son versus Jacks on. Jackson is a fairly common name. If you are named Jack and become a King are you a Jackking? Maybe your name is Jac. Jac King.

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