Noun: A skinny, preferably cylindrical, long object used to stir/un-stick marijuana from a pipe/glass piece so that it can be smoked properly.
A bingo stick can be anything from an unfolded paperclip to a twig, so long as it does the trick.
This phrase is usually expressed as an exclamation/demand.
BINGO STICK!
Translation:
I need something to stir the marijuana with man, this bowl isn't hitting properly.