fast one

Meanings

nounfast one (plural fast ones)

slangA trick or deception.
The salesman tricked me into paying twice for the same thing. That was a fast one!
Used other than figuratively or idiomatically: see fast, one.
If I bought a car I'd want a fast one.

nouna cunning or deceitful action or device

Similar

Broader

Also see

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry

APA

fast one. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/fast%20one

MLA

“fast one.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fast%20one. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “fast one,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/fast%20one.

Source: fast one on Wiktionary, CC BY-SA 4.0.