impaired by wear, use, etc.; worn: shabby clothes.
2.
showing conspicuous signs of wear or neglect: The rooms on the upper floors of the mansion had a rather shabby appearance, as if they had not been much in use of late.
3.
wearing worn clothes or having a slovenly or unkempt appearance: a shabby person.
4.
run-down, seedy, or dilapidated: a shabby hotel.
5.
meanly ungenerous or unfair; contemptible, as persons, actions, etc.: shabby behavior.
6.
inferior; not up to par in quality, performance, etc.: a shabby rendition of the sonata.
1669, from shab "scab" (now only dial., in ref. to a disease of sheep), from O.E. sceabb (see scab), with sound change as described in sh-. Cf. M.Du. schabbich, Ger. schäbig "shabby." Shabby-genteel "run-down but trying to keep up appearances" first recorded 1754.