The Collaborative International Dictionary of English v.0.48:

Bogart \Bogart\ n.
   Humphrey DeForest Bogart, famous movie actor; most commonly
   called Humphrey Bogart; b. 1899, d. 1957.

   Syn: Humphrey Bogart, Humphrey DeForest Bogart.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Humphrey Bogart
    n 1: United States film actor (1899-1957) [syn: Bogart,
         Humphrey Bogart, Humphrey DeForest Bogart]