thingumajig

noun

Meaning

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."

Synonyms

doohickey,

doojigger,

doover,

gizmo,

thing,

thingamabob,

thingy,

whatchamacallit,

whatshumacallit,

whatsitsname,

widget