A flush in the middle of the toilet-sitting process in order to reduce the aroma...usually performed on a "foreign throne" as a courtesy to the owner of said throne... in other words, to be polite and not stink up the host's crapper too much.
I gave a courtesy flush at the Smith's party because I didn't want to kill the next person to use the bathroom.
To grip or squeeze the buttocks of a member of the opposite gender, (or the same gender if that's what frys your bacon) thus allowing the butt cheek to come to rest momentarily in the hand.
Duration and pressure of hand contact on the buttock generally denotes the amount of sexingdesired by the palmer.
I was at a party and this blonde science girl was totally checking out my package, so when I walked over to refill my drink, I gave her an nice subtle ass-palm to let her know I was interested in sexing her up later on that evening.