The Collaborative International Dictionary of English v.0.48:

Crashing \Crash"ing\, n.
   The noise of many things falling and breaking at once.
   [1913 Webster]

         There shall be . . . a great crashing from the hills.
                                                  --Zeph. i. 10.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crash \Crash\ (kr[a^]sh), v. t. [imp. & p. p. Crashed
   (kr[a^]sht); p. pr. & vb. n. Crashing.] [OE. crashen, the
   same word as crasen to break, E. craze. See Craze.]
   To break in pieces violently; to dash together with noise and
   violence. [R.]
   [1913 Webster]

         He shakt his head, and crasht his teeth for ire.
                                                  --Fairfax.
   [1913 Webster]

WordNet (r) 3.0 (2006):

crashing
    adj 1: informal intensifiers; "what a bally (or blinking)
           nuisance"; "a bloody fool"; "a crashing bore"; "you
           flaming idiot" [syn: bally(a), blinking(a),
           bloody(a), blooming(a), crashing(a), flaming(a),
           fucking(a)]