Koochie avalanche

To get a women to lie down on her side and raise one leg, you will then proceed to rail up a fat bump of cocaine on the top half of her vagina and in one downwards motion snort most of the line and the left over cocaine will trickle down, which to then cause a koochie avalanche if executed correctly

Oi boys, see the old Shelia over there? I'm going to take her to the pub bathroom and give her a koochie avalanche