Thingamajig

Can you pass me that thingamajig?

That thingamajig does not work.

What's this thingamajig for?

He used this, this... this thingamajig you saw him with the other day to fix the problem.

"– – Engeneerin' is a cinch – All y' gotta do is shove one thingamajigg an' pull 'nother – –"

STORAGE boxes -- catchalls for flotsam, jetsam, whatnots and thingamajigs -- are gaining new interest as decorative objects for the home.