Q-ball is a hypothetical form of matter (namely, a non-topological soliton) in theoretical physics.
Q-ball or Q Ball may refer to:
Q Ball, the nickname of the dynamic pressure (Q) sensor module in the Apollo spacecraft launch escape system Q-ball, a slang term for the antipsychotic quetiapine, especially when mixed with stimulants
See also Cue ball, the ball struck with the cue stick in billiards, pool, snooker, and other cue sports Cueball Carmichael, American professional wrestler, trainer and promoter