THINGAMAJIG

doodad, doohickey, doojigger, gimmick, gizmo, gismo, gubbins, thingamabob, thingumabob, thingmabob, thingamajig, thingumajig, thingmajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget

(noun) something unspecified whose name is either forgotten or not known; “she eased the ball-shaped doodad back into its socket”; “there may be some great new gizmo around the corner that you will want to use”

Source: WordNet® 3.1

Etymology

Noun

thingamajig (plural thingamajigs)

(slang) Something that one does not know the name of.

Synonyms

• gizmo

• whatchamacallit

• whatshumacallit

• whatsitsname

• widget

• thing

• thingamabob

• thingy

• doojigger

• doohickey

• doover

• See also thingy

Source: Wiktionary