The itchy, annoying, smelly, totally unnecessary sweat that builds up in your asscrack, just above your asshole (where you'd grow a tail if you had one) - usually on hot days, or after strenuous physical exercise - or all the time on fat people.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.

A type of sweat that originates from the crack in your ass; often happens in the summer or intensely hot weather, especially while exercising.

(n.) The sweat that forms in the asscrack after a sustained period of strenuous physical activity, like running in the summer with three pairs of sweatpants and three layers of coats on in Taiwan. Also can be the sweat that forms in your butthole due to an intense masturbation session or from being horny for an excessive amount of time.