The act of sneakily leaving crap in someone else's room, house, suitcase, car, etc. when they are not paying attention such as old tupperware or knick knacks. Items are usually left with a note saying "You've been McKaiged" and the date attached so the person knows how long they have haven't noticed the item in question. Can last anywhere from several hours to several years before the person notices, depending on how clueless they are.

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