The Collaborative International Dictionary of English v.0.48:

Cragsman \Crags"man\ (kr[a^]gz"man), n.; pl. Cragsmen (-men).
   One accustomed to climb rocks or crags; esp., one who makes a
   business of climbing the cliffs overhanging the sea to get
   the eggs of sea birds or the birds themselves.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cragsman
    n 1: a climber of vertical rock faces [syn: rock climber,
         cragsman]