memory loss less severe than a blackout, generally spanning 15-20 minutes and sandwiched by periods of clear to semi-clear recollection, and almost always after a duration of heavy binge drinking.
Stacy had a nice brownout last night, he remembers getting home but doesn't recall eating at Los Tres Panchos.
"Aw man, dude. Last night was crazy. Joey had a massive brownout."
"What's a brownout?"
"It's when your bowels explosively evacuate themselves with much fanfare."