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1.
An unworldly fart of epic proportions.

Barbaric, Brutal and stops at Nothing"..
"Ghengis is on his way lads!"

"what's that... oh..NO!! someone dropped a ghengis!!"
by MickieB January 19, 2008
 
2.
Small patch of facial hair which resides on or just below the lower lip, not to be confused with a goatee, which is found on the chin.
Frank Zappa actually trademarked the image of his mustache and ghengis.
by Stephen Jansen August 28, 2004