Bottom can refer to: Bottom is lowest part of an object. the buttocks Top and bottom in sex and BDSM bottom (BDSM) Nick Bottom, a character from Shakespeare's A Midsummer Night's Dream Bottom (TV series), a British sitcom and stage show The bottom quark, a subatomic particle Bottom element, in lattice theory and related branches of mathematics The bottom type, or empty type, in type theory. "Bottom", a song by Tool from their 1993 album Undertow a cargo vessel, or a ship.… (More on Bottom)