look up any word, like swag:
 
1.
An imaginary ball that does not exist, except in the minds of hallucinatory mental patients. Only really stubborn people who are obsessed with catching pokemon that cannot be caught use this word.

Pang balls are not invisible because they do not exist.

if pang balls somehow were somehow real, they would not work on humans.
Dude, that mental patient just used an imaginary pang ball!
by The Ball Master August 31, 2010