High Spade poker
1) A side bet in which two or more players (usually in a draw
or lowball game) agree that whoever has the highest card in
the spade suit on the next hand (or, if no one has a spade that
hand, on the following hand or hands) wins something, usually
a prearranged bet, or a free drink bought by the loser or losers.
2) To play for the high spade. "I'll high spade you for
the drinks" means that if, for example,
I get the seven of spades on the next hand and you get no spades
or a spade lower than the seven, you're supposed to buy me a
drink, if you agree to the proposition. Sometimes called just
spade.