Whatsisname
noun, slang
noun, slang ·Uncommon ·College level
Definitions
Noun
- 1 A placeholder for the name of a man whose name the speaker cannot remember. colloquial
Synonyms
All synonymsEtymology
Derived from running together the words in the phrase what is his name.
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.