noun. A doodad with psychological functions, implications, or tassels.
Real citation: “You're eating puddings && I miss you. =[ Come back soon yeah like now We need to talk about this psychomajiggy thing mehehe xo”
(March 16, 2007, http://profile.myspace.com/index.cfm?fuseaction=user.viewprofile&friendid=128871214)
Made-up citation: “Every trained therapist needs a prescription pad and a psychomajiggy; an Olympic-sized pool of grain alcohol complete with floaties and a bartender/lifeguard will also come in handy.”