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to jack off

8 9.9
To touch your own private parts to get sexual pleasure, usually by a man
  • phrasal verb
  • /dʒæk ɔf/
  • Offensive
translation icon : hacerse una paja
  • Oh, there's a porno in the VCR if you wanna jack off.

So sagging bunks and guys farting and jacking off and all night long all around you.

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Examples

Synonyms

to masturbate
vsto jack off
  • Offensive
98 7.7

Touch your own private parts for sexual pleasure

is the informal vulgar expression rather than neutral clinical language
to jerk off
vsto jack off
  • Offensive
30 9.9

To touch your own private parts to get sexual pleasure

is identical in meaning but differs only in phrasing
to wank
vsto jack off
  • Offensive
5 9.9

To touch your own private parts to get sexual pleasure

is the common vulgar term used outside Britain
to flog the dolphin
vsto jack off
  • Offensive
1 9.9

To touch your own penis to make yourself sexually excited

is the blunt vulgar wording instead of a playful euphemism
to beat one's meat
vsto jack off
  • Offensive
9.9

To touch his own penis to feel sexual pleasure

is the straightforward vulgar expression without metaphor
to choke the chicken
vsto jack off
  • Offensive
9.9

To touch a man's penis to make him sexually excited

is the direct vulgar phrasing rather than a playful idiom

Surface Forms

jack off infinitive
jacked off past
jacked off past participle
jacking off present participle
jacks off third person singular

Morphology

jack + off

The idiomatic, vulgar sense of 'jack off' (here glossed as 'waste time') does not follow a transparent composition from 'jack' (slang for nothing) + 'off' and is unpredictable for a learner who only knows the parts. This is slang/idiomatic usage (and often used with a different vulgar meaning), so a B1 learner would not reliably infer the MWE meaning from its constituents.

Etymology

Jack off is a slang verb that probably comes from the older phrase jerk off, which shows a quick, repeated hand movement done alone. That's why it means 'to masturbate'.