D.T.B. Share definition Flag A day time bone. The act of having sex when it is still light out. Yo girl you wanna come over for a D.T.B.?Girl: Of course, I'll be there in 10. D.T.B. by srfnsk8 December 4, 2010 0 0 Get merch Get the D.T.B. mug. Buy Now — $32.95 See more merch