A Gilded Gopher is when you defecate in an inappropriate manner, much like an upperdecker or sidecar, but you cover up the turd with spray-paint. The next unsuspecting user of the tub or toilet won't see the Gilded Gopher, because it's color matches the toilet or tub that it has been laid in.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.