Top definition
(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!
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
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