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1.
formed from "blumpkin" except additionally tripping on shrooms while recieving head and taking a shit.
"dude i picked up some shrompers friday." "was it sick?" "totally, then sally gave me a shrumpkin!" "fuckin crazy!"
by TheFcknJewfro March 02, 2010
 
2.
Derived from "blumpkin," a shrumpkin happens when a man sharts while receiving oral sex.
That chick was pretty upset when I gave her a shrumpkin last night.
by Flannel Jake November 12, 2010