wail (v.) Look up wail at Dictionary.com
c.1300 (intransitive); mid-14c. (transitive), from Old Norse væla "to lament," from "woe" (see woe). Of jazz musicians, "to play very well," attested from 1955, American English slang (wailing "excellent" is attested from 1954). Related: Wailed; wailer.
wail (n.) Look up wail at Dictionary.com
c.1300; see wail (v.).