tramp (n.) Look up tramp at Dictionary.com
"person who wanders about, vagabond," 1660s, from tramp (v). Sense of "steamship which takes cargo wherever it can be traded" (as opposed to one running a regular line) is attested from c.1880. The meaning "promiscuous woman" is from 1922.
tramp (v.) Look up tramp at Dictionary.com
late 14c., "walk heavily, stamp," from Middle Low German trampen "to stamp," from Proto-Germanic *tramp- (cf. Danish trampe, Swedish trampa "to tramp, stamp," Gothic ana-trimpan "to press upon"), probably from a variant of the Proto-Germanic source of trap. Related: Tramped; tramping.