The low count where the ace is high and straights and flushes hurt.
Used by 2-7 Triple Draw and 2-7 Single Draw, where the best hand is 7-5-4-3-2. Example. 7-6-5-4-3 is a "7 low" in A-5, but in 2-7 it is a straight and a bad hand, and 8-5-4-3-2 is the fifth-best hand in 2-7. A straight or flush loses even to a one-pair hand.