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3.
when a player cheats in connect four. it is a move when a player slips a chip into the holes and then dips one.
it was banned after Al Smith won a tournement with the move in 1993.
John used the slip n' dip and was banned
by conect four geek August 07, 2007
 
1.
1. when someone leaves the toilet seat up,
then the next person carelessly sits down, causing their ass to slip n' dip into the water

2. when the anus has direct contact with toilet water when the toilet seat is left up and one sits down
john experienced a slip n' dip at the office, he now has a mullet.
by hannah and leigh December 19, 2006
 
2.
THE ACT OF SLIPPING YOUR PENIS IN A GIRL WITHOUT HER KNOWING OR REALIZING
GIRL 1:DID YOU HOOK UP WITH HIM LAST NIGHT

GIRL2: YOULL NEVER GUESS WHAT HAPPENED HE WAS FINGERING ME AND THEN HE SLIP N' DIPPED BUT I WAS SO BLACK OUT I DIDNT EVEN NOTICE AT FIRST

GIRL 1: AH THE CLASSIC SLIP N' DIP GOTTA LOVE IT
by DEEJAY GOD March 28, 2011