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!"
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
"Check out Dave's alfalfa"
when a male gets an erection.
"Yo dude she is so hott, i just got an alfalfa"
A big kiss with tongue and stuff.
She gave me this hot alfalfa. It was hot.