slip
noun
°(obsolete) Mud, slime.
°In ceramics, a thin, slippery mix of clay and water.
verb
°To lose one's traction on a slippery surface; to slide due to a lack of friction.
°To err.
synonyms: blooper, blunder, boo-boo, defect more» , error, fault, faux pas, fluff, gaffe, lapse, mistake, stumble, thinko