1. Used to describe how the sound of running water induces you to pee. 2. May also be used to describe how when a girl has to go to the bathroom every other girl has to go as well. Example: God, that table has all the cute guys. Lets go over there and talk about white water rafting. Ramona, you make the appropriate noises. When they experience the waterfall effect, well steal the boys.
WATERFALL EFFECT
Meaning of WATERFALL EFFECT in English
Slang English vocab. Английский сленговый словарь. 2012