Colon Yodel 

A particularly long and loud fart, usually with multiple changes of pitch.

I tried to choke off that fart in the 'vator, but once it started leaking I just went all colon yodel.

Colon Yodel by luckymike January 18, 2008

Colon Yodel 

A very, very loud and obnoxious fart.

Aw man, Jack pulled a colon yodel last night. It was nasty.

Colon Yodel by Sonny Boi January 12, 2016