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.
Pipere gigglefarts when tickled
by beedlin'mai May 27, 2009
The act of farting while laughing
Courtney W has the giggle farts...
by Grassroots January 26, 2016