Taking your shirt off the second you get within twenty feet of water, regardless of how sloppy looking you are. Dignity and self-respect are meaningless when practicing 'sun's out, tum's out'.
Dude 1: Jody can't go near a body of water while keeping his shirt on. Check him out over there in the kiddy pool splashing water on his gut.
Dude 2: Sun's out, tum's out bro. Stop shaming.
Dude 2: Sun's out, tum's out bro. Stop shaming.
by joemammy August 2, 2019
Get the Sun's Out, Tum's Outmug.