Definitions by Chico The Chairman

giggleloop 

A feedback-type mechanism whereas someone who thinks about laughing (and doesn't) continues to think about how funny said laugh would be (while not doing it) over and over until they eventually cave, especially during a prolonged moment of silence.

Steve elicited a giggleloop when he kept himself from laughing at Jane's dead aunt.

giggleloop by Chico The Chairman July 7, 2007