1) Atari 8-bit family game 2) Badly missed hoops shot 3) Complete miss 4) Complete miss for a hoopster 5) Complete miss in basketball 6) Court embarrassment 7) DOS game 8) Game Boy Advance game 9) Hoops brick 10) Hoops embarrassment 11) Jumper that misses everything 12) Lousy shot for Shaq 13) Shot that misses everything 
Airball is American slang for a slow, dim, eccentric or unpleasant person.
A shot attempt that doesn't hit the rim or the backboard.