what‧cha‧ma‧call‧it /ˈwɒtʃəməˌkɔːlɪt $ ˈwɑːtʃəməˌkɒːl-, ˈwʌtʃ-/
noun [countable][
Date: 1900-2000;
Origin: what you may call it]
spoken a word you use when you cannot remember the name of something:
I’ve broken the whatchamacallit on my bag. [TahlilGaran] Dictionary of Contemporary English ▲