limbo (1) Look up limbo at Dictionary.com
"region supposed to exist on the border of Hell" reserved for pre-Christian saints (Limbus patrum) and unbaptized infants (Limbus infantum);" c.1300, from L. (in) limbo "(on) the edge," abl. of limbus "edge, border" (see limb (2)). Figurative sense of "condition of neglect or oblivion" is from 1642.
limbo (2) Look up limbo at Dictionary.com
dance in which the dancer bends backward and passes under a bar, 1956, of W.Indian origin, probably an alteration of limber.