WordNet sense 1 (a dull stupid fatuous person):

dork

WordNet sense 2 (meat (especially beef) cut in strips and dried in the sun):

jerky, jerked meat

WordNet sense 3 (move with abrupt, seemingly uncontrolled motions):

twitch

WordNet sense 4 (jump vertically, with legs stiff and back arched):

hitch

WordNet sense 5 (pull, or move with a sudden movement):

yank

WordNet sense 6 (throw or toss with a quick motion):

flick

WordNet sense 7 (an abrupt spasmodic movement):

jolt, saccade, jerking

WordNet sense 8 (a sudden abrupt pull):

tug