The artificial smile left on your face when your real smile should have been terminated by something said by somebody else. Usually accompanied by a sudden and severe absence of the positive feeling that brought the smile on to begin with.
He told me my joke was ridiculous and that I should feel bad for saying it. Not to be shot down, I maintained my aftersmile until he left the room.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.