good-for-naught

(noun) an idle worthless person. Synonyms: goldbrick, goof-off, ne'er-do-well, good-for-nothing, no-account.

(adj) without merit. Synonyms: good-for-nothing, meritless, no-account, no-count, no-good, sorry. Examples: "A sorry horse." "A sorry excuse." "A lazy no-count, good-for-nothing goldbrick." "The car was a no-good piece of junk."