bum power noun smell of stale human excrement; Am. the unmistakable smell of days-old excrement originating from someone’s undergarments; mil. vul. the stench of fermented excrement originating from a military officer’s undergarments after an extended period of time in battle; the smell that accompanies “skid marks” (see definition for “skid mark”);
Sandy then asked "why does it always smell like ass when Sue leans over the table to talk to her bridge partner?"
Kendra quickly answered "oh! That's her bum power!!"