2. (noun) Code for an erection caused by clandestinely watching a stunning rack of tits jiggle.
3. (verb) When an amply endowed young woman seeks to actively encourage her boobies to move and jiggle in response to the movement of a vehicle, horse, trampoline or earthquake.
2. When she realized Bobby was watching, Amy put her arm over the back of the seat, arched her back a little and fired off a salvo of jiggle chum at him.