Definitions for thingamajigˈθɪŋ ə məˌdʒɪg
Random House Webster's College Dictionary
thing•a•ma•jigˈθɪŋ ə məˌdʒɪg(n.)
a thing for which the speaker does not know or has forgotten the name.
Category: Common Vocabulary, Informal
Origin of thingamajig:
1870–75; thingum or thingummy (based on thing1) +jig1
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"
Kernerman English Learner's Dictionary
thingamajig(noun)ˈθɪŋ ə məˌdʒɪg
used when you do not know the name of sth
You know, that thingy you turn the TV on with.
Something that one does not know the name of.
He used this, this... this thingamajig you saw him with the other day to fix the problem.