Yam is an abbreviation for "young attractive female." It is used to describe youthful, good-looking girls/women, and is generally used in a complimentary, sexual or flirtatious way. The male equivalent is yam.
"Wow, did you see that gorgeous yaf walk past?"
"Do you want to go out tonight? Could really hunt down some yafs."
"Can't believe you pulled that yaf. Damn son."
by Yam Hunter July 18, 2017
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Acronym for the saying: You're A Fag
Tommy: Hey you, come lick my balls.
Ralph: GMF, yaf.

*also see GMF for meaning.
by Jarulez April 17, 2005
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Short for Young Americans for Freedom, YAF is a minuscule college club where stuck up trust fund Babies can suck the cocks of overpriced Conservative speakers for appointments and jobs in DC.
Apparently Charlie Kirk is speaking to the YAF chapter! As if turning point itself wasn’t cringe enough! God do you think more then 5 people will show up? They are dropping a grand on Kirk!
by Enderlee February 14, 2020
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Telling someone that they are a faggot.
It is popular to use on the internet but some say it face to face. An example would be calling your friend a YAF for example....
WOW Max YAF
by yoyme December 2, 2010
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Every time I try to score with a girl, YAF happens.
by SmashPlayer125 October 18, 2014
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A migrant farm worker who is less than 5'2" tall.
Go down to Four Mile Run and pick up some yafs - we've got harvesting to do.
by toasterhead January 4, 2004
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