Tooty Pebbles 

Inadvertant output of solid matter when attempting gasseous release.

I tried to eek one out on the crowded train but ended up with tooty pebbles in my britches.

Tooty Pebbles by dknysquid February 19, 2009

pebble toot 

Little fart escaping the butthole at minimal speed.

"Jerry, did you just let out a pebble toot!"

Synonyms: Rock toot, stone toot, little fart, and puff of air.

"Jerry, did you just let out a pebble toot!"

pebble toot by Jerry springer October 6, 2015