Slayin' Yams is a synonym to words and phrases commonly used for
sex. Such as:
Fucking, Getting ass, Cheeks,
Buns, so on... Only the broest of the bro's can use this term.
Guy1:Yo, what did you do this
weekend?
Guy2: Went to the shore with some chicks.
Guy1: Nice! You get some?
Guy2:Yea dude, I was slayin' so many
yams
Guy1: Sweet, you stay slayin'
yams man.