Top definition
A word used to replace a word that you don't know. "Doohickey" and "thingamajig" are equivalents.
You just push the button on the watchamacallit, then it's ready!
by th100 May 27, 2010
Happy St. Patties Day!
A word to say when you can't recall the word you require.
Ohmygosh! Have you ever seen or been to... *click fingers* uhhh..... watchamacallit?
by jessklara August 26, 2011
Happy St. Patties Day!
The hershey candy bar with the biggest frikin name ever. They must've had some real good ideas on the name thinking this one up.
Hershey board meeting:

CEO 1:So do we have any suggestions for this new candy bar. No?, well lets put on our thinking caps guys, because this is one hard nut to crack. Its more of a watchamacallit?
by NateK July 10, 2005
Happy St. Patties Day!
Tried to put that watchamacallit on the you now and it didn't work
by Obmas January 31, 2017
Happy St. Patties Day!