Donkey shart is when you shart in a public place and you have to haul ass out of there.

(Usualy you go home to change clothes and take a shower.)
Bob: Ted totally donkey sharted last night at beths house.

Timmy: Yeah i saw him come out of the shower when i came home after the party.

Beth: I was wondering why he ran out so fast.
by geno2k3 January 15, 2008
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