goof

v. i. to commit a faux pas or fault.
Syn. -- sin, commit an offence, blunder, boob. [ WordNet 1.5 ]

v. i. To shirk one's duties; to avoid work by relaxing or performing idle activities. [ Informal ] [ PJC ]

n. A person who habitually shirks his duties or avoids work; an idle worthless person. [ Informal ]
Syn. -- goldbrick, ne'er-do-well, good-for-nothing, good-for-naught. [ WordNet 1.5 + PJC ]

a. such as will function properly even if treated badly or ineptly; foolproof; -- of devices, plans, recipes, etc.; as, nothing running under Windows is completely goofproof.
Syn. -- foolproof. [ WordNet 1.5 +PJC ]

v. t. To design (a device or plan of action) so that it will function properly even if treated badly or executed ineptly; foolproof.
Syn. -- foolproof. [ WordNet 1.5 +PJC ]