According the Merriam Webster Dictionary, thingamajig is the name given to any object for which the namer “either does not know or cannot remember” the name. In other words, a thingamajig is what you call a doohickey when you forget what that infernal whatchamahoosit is called. How many names do you know for a whatsit? Test yourself against this list of than 60 different synonyms for a thingumaboobee.
