Woot-toot!
"Woot-woot" is defined by the Urban Dictionary as an expression of excitement or joy, typically upon receiving good news. Thus Woot-toot is an expression of excitement upon sensing a joyous or otherwise remarkable fart.
"Moments after finishing his third burrito, my roommate emitted a fart of rare and surprising duration, harmony, and syncopation. 'Woot-toot!' I cried."
Woot-toot! by The Jeff S March 30, 2017
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