adj. May involve rubber duckies and a sponge bath--if you’re lucky. Or horribly ill.
Real citation: “I bet more people die by falling in their bathtubs. You want to pass a bathtubular homicide law too? Convict the guy who built my house for not putting flowered stickers in my tub!
(Sept. 16, 2006, Metroblogging Portland, http://portland.metblogs.com/archives/2006/09/should_oregon_t.phtml)
Made-up citation: “I switched my major to advanced bathtubular biology after discovering new worlds and new civilizations in my skanky tub. FYI: I am their God.”