from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang An article whose name is unknown or forgotten.
- n. Slang A person regarded as stupid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Something whose name is either unknown or forgotten; a thingamajig.
- n. A fool or incompetent person.
- n. penis
Dutch dinges, whatchamacallit, from German Dings, from Middle High German dinges, genitive of dinc, thing, from Old High German ding, thing, assembly, case, thing.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Dutch dinges, ding ("thing"). (Wiktionary)