jack off

verb

jacked off; jacking off; jacks off
vulgar
: masturbate

Word History

Etymology

probably alteration of jerk off

First Known Use

circa 1916, in the meaning defined above

Time Traveler
The first known use of jack off was circa 1916

Rhymes for jack off

See All Rhymes for jack off

Browse Nearby Words

jack-of-all-trades, master of none
jack off
jack-over-the-ground
See all Nearby Words

Cite this Entry

“Jack off.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jack%20off. Accessed 18 Jul. 2025.

Copy Citation

Share

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Popular in Grammar & Usage

See More

'Affect' vs. 'Effect'

More Words You Always Have to Look Up

Using Bullet Points ( • )

Why is '-ed' sometimes pronounced at the end of a word?

Words You Always Have to Look Up
See More

Popular in Wordplay

See More

Ten Painless Ways to Improve Your Vocabulary

How 'Namaste' Entered The English Language

Our Best Historical Slang Terms

'Za' and 9 Other Words to Help You Win at SCRABBLE

12 Words Whose History Will Surprise You
See More

Popular

See More

'Affect' vs. 'Effect'

Ten Painless Ways to Improve Your Vocabulary

How 'Namaste' Entered The English Language
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
a plate of arepas
Name That Dish! Some mouth-watering food for thought
See All