n: any semblance of a tub characterized in it's use by scantily clad or naked, drunken, promiscuous SU-LUTS that is filled with hot aerated water and often equipped with a thermostat and whirlpool: designed for physical therapy but more often used for groping, heavy petting, or if you're lucky, banging away.
—Related forms
slut-tubber, noun
slut-tubbing, noun