Yours, Etc.: Origins and Uses of 8 Sign-Offs
"one who throws bombs," 1915, agent noun from bomb (v.). As a type of military aircraft, from 1917.
A tablet of Halcion2 ,a sleeping pill: ''Time for a blue bomb,'' he announces before naps (1980s+)
A crude cocktail: The kids had been chugging ''bombers''—a mixture of liquors, wine and beer (1980s+)