Vocabulary : Slang : J : jerk off | jack off

jerk off | jack off

Meaning: to masturbate

For example:

"Our sex education teacher said it's normal for boys to jerk off."
A: "What's Greg doing?" B: "He's looking at porn on the internet and jacking off."

Note: these words are used in reference to boys and men only

Quick Quiz:

Chris was in the bathroom for so long because he was jerking off. He was