The accumulation of rogue hairs from a woman's head on a man's genitals after sex; similar to the gathering of free floating seaweed. Usually not noticed until the putting on of underwear or taking a shower.
1. "You know Susie is bulimic, right?"

"Well, that would explain all the sexweed."

2. "I can feel some sexweed tangled around my balls."

3. "I didn't realize how hard I was pulling her hair until the next morning when I found tons of sexweed."
by Adenosine July 30, 2010
Top Definition
having sex with a woman or man and it feels so good that you just feel really high....
Sex Weed - R.Kelly
"Sex so good that it gets me high"
by Vibez July 11, 2005
the general act of placing rose petals and your selection of bud in the bongwater.
Hey baby lets smoke this Sex-weed!
by gongetcha April 15, 2010
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