jerk off
To masturbate by manually stimulating one's own penis.
My partner and I jerk off together sometimes.
ADJ
sharp, sudden | painful
VERB + JERK
give
When the car stopped suddenly, my body gave a violent jerk forward.
PREP
with a ~ of
He woke up suddenly with a jerk of his body.
ADV
suddenly | sharply, violently | convulsively, spasmodically
away, back, backwards, downwards, forward, round, up, upright, upwards
The child jerked backwards when the dog suddenly barked at him.
PHRASES
jerk awake
He jerked awake in the middle of the night, confused about where he was.
jerk sth open
She jerked her backpack open to find her phone before the meeting started.
jerk to a halt/stop
The car jerked to a halt when the driver saw the red light ahead.