WordReference Random House Unabridged Dictionary of American English © 2025
flat′ tire′,
- a pneumatic tire that has lost all or most of its air through leakage, puncture, or the like.
- Slang Terms[Older Slang.]a dull or socially inept person.
- 1920–25
'flat tire' also found in these entries (note: many are not synonyms or translations):