When you have opportunity for several days off from work/school/any type of responsibility spent partying, eating, watching TV, sleeping, etc., but NOT showering, and wearing the same shorts/sweatpants during said time. Thusly creating a dinstinct odor to arise when getting up from the couch/chair. The odor, of course, eminating from one's stank nuts.
Dave-Hey man, why don't you come over and chill, I ain't seen ya in like 4 days!
Mike-Ok, but first I gotta get a shower to get ridda my stank nuts.