a person accustomed to or skilled in climbing crags
Word origin
[1810–20; crag1 + -s3 + man1]This word is first recorded in the period 1810–20. Other words that entered Englishat around the same time include: dynamic, liberalism, rationalize, realism, unitary-s an ending marking nouns as plural (boys; wolves), occurring also on nouns that have no singular (dregs; entrails; pants; scissors), or on nouns that have a singular with a different meaning (clothes; glasses; manners; thanks). The pluralizing value of -s is weakened or lost in a number of nouns that now often take singular agreement,as the names of games (billiards; checkers; tiddlywinks) and of diseases (measles; mumps; pox; rickets); the latter use has been extended to create informal names for a variety of involuntaryconditions, physical or mental (collywobbles; giggles; hots; willies). A parallel set of formations, where -s has no plural value, are adjectives denoting socially unacceptable or inconvenientstates (bananas; bonkers; crackers; nuts; preggers; starkers)