When a man from Mississippi is going down on his sister/wife, and get's a surprise mouthful of his daddys cum.
by Fatkhunt1292 June 15, 2020

sucking on a guy's dick. the dick is the south because it's "down at the bottom" and you put it in your mouth.
Girl: lets go to WifeSaver to grab something to eat.
Boy: Yea sure, but you have to put a little south in your mouth first.
Boy: Yea sure, but you have to put a little south in your mouth first.
by polkadotz January 31, 2008

(only for guys) when you stick your hand down the back of your pants, then rub your ballsack. touch the victim or- slap- them in the mouth or face. Then yell "DOWN SOUTH IN YOUR MOUTH!!" no teacher will know what it means.
Colin: oh my god!
Matt:what?
Colin: That ass-hole just did a down south in your mouth to me.
Matt: oh. HA!
Matt:what?
Colin: That ass-hole just did a down south in your mouth to me.
Matt: oh. HA!
by John Lennon iz not me October 01, 2009

by vtims December 08, 2020

by vtims December 08, 2020
