A tuft of hair that sticks up, e.g. after a night's sleep. All other hair is stuck down with either one strand or just a tuft of hair sticking up at the back of the head.

Alternative spelling - Alfalpha, Alphalpha, Alphalfa
by Blaustifft July 14, 2008
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when a male gets an erection.
"Yo dude she is so hott, i just got an alfalfa"
by surfbum2390 June 12, 2009
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if you are receiving oral sex from your girl but she doesn't like to swallow you pull out when you are ready to orgasm and ejaculate across the top of her head giving her some what of a cow lick look
"girl why is your hair sticken' up in the back?" "i didn't want to swallow so my man gave me an alfalfa!"
by z'boy November 20, 2007
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She gave me this hot alfalfa. It was hot.
by Avram Fawcett June 3, 2006
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A kind of fellow some ladies in search of an Alpha male may end up with.
The key distinction here is that instead of being the man's man they were looking for (charming, confident and entertaining), deep inside he's fundamentally still a kid whom:

1) is capable to ending up in trouble for doing shit as dumb as hell.

2) hangs out with equally maladjusted, immature friends.

3) may often show more interest in shit like Wrestlemania on TV, playing videogames and fidgeting idiotic apps than in an actual night out with his woman.

From the character of the old TV Series "The Little Rascals", a.k.a "Our Gang".
Woman1: "How's Sheena? I heard she got a new BF..."

Woman2: "Yeah, whom she tended to saturday night at the ER after he opened his forehead on a tree branch by riding stolen bicycles pissed drunk with his friends. Got picked up by the cops and they had to give him ten stitches".

Woman1: "Wow, I thought she needed her Alpha male..."

Woman2: "Yup she did, and she ended up with her Alfalfa male. He's 37, by the way".

Woman1: (eye-rolling)
by Parcerito July 14, 2011
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A rural person in the city for a bit of action.
That alfalfa farmer was just cruising for a BJ, didn't matter if he found a man or a woman or what.
by SixFingerSalute March 22, 2006
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