lint and tissue build up that clings to the hairs in armpits or skin caused by deordorant, lint, and sweat. Looks funny on females when caked up wearing a black shirt.
Dude did you see her when she yawned with her arms up. Whats that shit in her pits. She must have a case of the pit berries.
Check your pits man you got some serious pit berry action. You better wipe that shit down.