NB- The word itself has a very specific pronounciation, that can only be described as how Sean Connery would sound if he spoke like the Queen of England.
Wipe your brow with a jockstrap! -frush-
Usage: Most commonly heard at a Hold'em poker game, it is a sly insult uttered by a player not involved in the hand and is directed at the losing player, who most often called a large bet thinking his hand was best. The phrase is always packaged in this manner "What the fuck's a FRUSH?" It is to say that the losing player is as dumb as an Asian who doesn't know how to play the game or pronounce the word correctly.
"Sounds like you have a crush on him!"
"Naw, man, I don't want to kiss him or anything. Its more like a 'frush'."