Suction
Defense against 1NT opening: suit overcall shows either 1) the suit above it, or 2) five-five distribution or better in other 2 suits
- 2
diamonds, OR 5 - 5 in hearts and spades - 2
hearts, OR 5 - 5 in spades and clubs - 2
spades, OR 5 - 5 in clubs and diamonds - 2
clubs, OR 5 - 5 in diamonds and hearts
Overcaller will usually hold the long suit and not the five-five distribution.This defense is similar to TRASH overcalls, although I believe TRASH overcalls show more strength.