英:['θɪŋəməˌbɒb]
美:['θɪŋəməˌbɒb]
英:['θɪŋəməˌbɒb]
美:['θɪŋəməˌbɒb]
noun
something whose specific name or designation has been forgotten or is not known
mysterious electrical thingumbobs that go off with a bang—Literary Review
irregular from thingum
The first known use of thingumbob was in 1751