Verb; To go from party to party to see which one all the bitches(or guys depending on your orientation) are at or which party is the best time. This can also apply to women instead of parties.
"Hey which party should we go to tonight?" "I do not know, we might have to do a tip drill."
Tip-Drill: When a man or a woman with a strap-on just barely sticks the tip in the vagina or poop-chute. Sometimes used for pleasure, othertimes used as a tease.