Something eaten after a particularly intense meal/snack to get the flavor out of your mouth. A good palette cleanser tastes relatively subtle or bland.
Yeowch, these Altoids set my mouthon fire! I need me a good palette cleanser. Do we have any Fritos?
Something you eat/drink BEFORE you take a shot (rather than after) to ease the consumption of the foul tasting alcohol. Examples include a non-centered triangular sector of a lemon right before chugging a vodka + LLB.
WOAH before you drink that shot eat this Palette-Preanser, man! I'd hate for you to not be able to down that foul tasting shot of alcohol because you didn't eat the Palette-Preanser.
A method of shaving one's balls where a deposit of shaving cream is kept on the thigh for the shaver to grab from as needed to relather his balls.
Person #1: Man, shaving my balls in the shower was such a mess until I heard about the painter's palette. Now I can selectively apply the shaving cream to my balls!