JERK
1 —none. 1 sharp sudden pull, twist, twitch, start, etc. 2 spasmodic muscular twitch. 3 (in plural.) Colloq. Exercises (physical jerks). 4 slang fool. —verb. Move, pull, thrust, twist, throw, etc., with a jerk. ? jerk off coarse slang masturbate. [imitative]