BridgeHands

Suction - A defensive bidding system against opponents 1 Notrump opening bid, primarily showing the suit above the suit bid or the two suits above that (where Clubs are "above" Spades)
 

(1N) - 2C	Diamonds, or Hearts and Spades
(1N) - 2D	Hearts, or Spades and Clubs
(1N) - 2H	Spades, or Clubs and Diamonds
(1N) - 2S	Clubs, or Diamonds and Hearts

Also see TWERY