Green’s Dictionary of Slang

1. (US) to beat up, to trounce.

1939		K. Tennant Foveaux 232: Goes and takes a job as a volunteer and gets himself fractured. I don’t wonder the woman’s frightened.
1971		E.E. Landy Underground Dict. (1972).

2. (US) to astonish, to disconcert.

1944		P. Kendall Dict. Service Sl. n.p.: it fractured me . . . nonplussed me.
1971		E.E. Landy Underground Dict. (1972).
1976		A. Salkey Come Home, Malcolm Heartland 169: Fracture him wit’ the news ’bout beloved Tom.

3. to make one laugh, to amuse greatly, e.g. that fractures me, that’s an amusing joke.

1952		W.R. Burnett Little Men, Big World n.p.: You fracture me, Elmer [...] To look at you, a person would think you just came in wih a car-load of cattle.
1962		S. Longstreet Flesh Peddlers (1964) 272: And she talks. That fractures me – she talks.
1971		H.E. Roberts Third Ear n.p.: fracture v. to make one laugh; e.g. This will fracture you.