Squeakim
A small, high pitched, funny sounding fart, caused by attempting to make a large fart come out silent in order not to look stupid, in the end making the farter in question look even more stupid.
"I was talking to this girl and I felt a fart coming on, so I tried to adjust my butt cheeks to silence it, but it came out as a squeakim. She laughed at me and left."