dick in your mouth! DIYM
shoving your index finger into an unsuspecting open mouth
some dumptruck at a bar won't quit yapping her hussy face off; rather than insulting her and her friends or trying to continue to just get laid, wait for an obnoxious laugh and pop your entire finger into her mouth while saying "dick in your mouth! DIYM". conversation satisfyingly over, and at least you get a good laugh out of it.