The Collaborative International Dictionary
whachamacallit
whachamacallit \whachamacallit\, n. Any object whose name is forgotten, or not known. [Also spelled whatchamacallit.]
Syn: thingumbob, doohickey, dingus, whatsis, what-do-you-call-it. [PJC]
whachamacallit
whatchamacallit \whatchamacallit\, n. Any object whose name is forgotten, or not known. [Also spelled whachamacallit.]
Syn: thingumbob, doohickey, dingus, whatsis, what-do-you-call-it. [PJC]
Wiktionary
whachamacallit
n. (alternative spelling of whatchamacallit English)