goldbrick
n.
1 [Colloq.] a worthless metal bar gilded and sold as solid gold in a swindle
2 [Colloq.] anything worthless passed off as genuine or valuable
3 [Mil. Slang] a person who tries to avoid work; shirker; loafer: also gold4brick#er
vi.
[Mil. Slang] to shirk a duty or avoid work; loaf