Top Definition
(Idiom) followed by a wish for the future.
One day I want a ferrari 250 GTO/a mansion/a penis/ a doggie!/a job/ a girlfriend/a hitler moustache/ your phone number/ yo mama!
by Kung-Fu Jesus May 05, 2004
3 more definitions
A euphemistic way of saying never.
My boyfriend keeps asking for anal sex. I tell him I'll let him put it in my butt one day, but we both know it's never gonna happen.
by Not Getting In My Butt September 24, 2009
Euphemistic way of saying never.
My mum told me I'll be president one day.
by One Day I'll get a name September 28, 2008
The day after the day that was after the day that something was planned to happen. (Usually having to do with regret or missed opportunities.)
I regret not telling you. I am so sorry, one day...
by Zoo-Boy October 28, 2011

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