name for a strange part, what-cha-ma-call-it If I can get the thing-a-ma-jig in the right hole, this car may start.
THING-A-MA-BOB/ THING-A-MA-JIG
Meaning of THING-A-MA-BOB/ THING-A-MA-JIG in English
English idioms vocab. Словарь английских идиом и выражений. 2012