Having a very powerfully
visual trip after taking a hallucinogen. Be it mushrooms, acid, absinthe, etc...
Taken from the SouthPark episode Sexy Action
School News, when they go into the pharmacy to buy some cough syrop
to 'have some ideas' The pharmacist tells them "if you really want to trip balls" and suggests a certain brand of cough syrop
to them. The episode later demonstrates said tripping