To loose of a grip… lost the racket.

[SystemicAnomaly]

Or underwear. You don't want it to be too tight or too loose.

Come again. You are keeping a small bird in your underwear?

 

[Ronaldo]

Come again. You are keeping a small bird in your underwear?

Rockin' Robin, eh?

 

[Fintft]

It is pretty common for racquetball. On the indoor courts, the players sweat a lot and it is hard to keep a grip on the racquet. That is also why there are racquetball gloves.

Or change overgrips each time you hit and alternate between 2-3 sticks?