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(Verb) The act of raising the upper lip up to the nostrils and immediately inhaling, creating a vacuum that holds the lip in a raised position.

(Noun) The upper lip during this act.
"Wow! Did you see that old man do a massive mushkin?"

"Mmmmmmm. My mushkin smells great today."
by stanleymilan September 24, 2007
an affectionate nickname for ones cat...
"Awe look at the little mushkins ... awe le mo sputeen"

by mushk March 12, 2009