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a person who likes to rest big black and or mexican penis on his or her forehead in a sexual manner so that the genitals are resting in the man or womans eye pockets, in some cases if a smaller penis the word tinka is applied, usually used as an insult word
That kid Dylan is the biggest tunka ive ever rested my shlong on.
by dylan June 19, 2006
Singular of Tukus, a slang for the derriere
Look at all the junk in the Tunka
by wetrockintheriver April 16, 2013