To giggle so hard as to push out a fart, or to giggle at an inopportune time when a fart was already at the brink of excretion, thus expelling when giggling.
(gi gl bitch) noun (plural: gi gl bitch es) a person, usually female, and frequently in pairs, that laughs hysterically at something stupid and/or inside jokes, oblivious to any surrounding situations, people, or sleepers. Frequently makes fun of others' laughter when not gigglebitching, and does not realize that she sounds more annoying.
can also be verbed, as in "gigglebitching"
Cassie and Hallie were being gigglebitches this afternoon when they were giggling incessantly at god-only-knows-what, while poor Allie was out of the loop, and increasingly annoyed.
The surprise emission of internal gases brought about by contractions of the muscles in the abdominal region during unstoppable fits of laughter such as experienced by tickle torture