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1.
Verb. To masturbate while looking at photos of busty, but clothed, late teenage girls on popular image hosting sites as webshots and photobucket. The term originated in 2005 after the release of a plethora of photos of a pleasant, outgoing girl with the surname "Wenk".
I could really wenk to that photo
by doc brown May 09, 2007
 
2.
Proper Noun. To be in the state of being a sexy beast. In the state of being irresistable to women over the age of 18.
Men in uniform are said to be wenks.
by Sarina August 22, 2004
 
3.
Noun; a pseudo-lesbian with enormous breasts.

Verb; to turn a straight girl gay with enormous breasts.
"Jessica is such a wenk."

"She uses her tits to wenk other girls."
by Valigarmander August 26, 2007
 
4.
A sound effect used in a story to exemplify a fall or a quick motion
I heard Jack Warner was on my road, so I fly out my house, WENKSSSS
by NeilG July 26, 2013