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1.
A word use in Ireland or UK for a diaper.
She tossed the soiled nappie out the car window and it splattered shite so thick I had to pull into the nearest gas station and clean it off.
by navillus March 05, 2004
 
2.
An adorable term for sleeping in the middle of the day. Often used by children under the age of five or those who think, talk and/or act like they are.
Kelly: Is it two in the afternoon already? Oh wow. I'm definitely overdue for a nappie!

Stephen: Did you really just say "nappie"?

Kelly: ...
by AMeteorShower April 22, 2010
 
3.
To have Nasty, disgusting, or greasy hair that is a mess and not taken care of. Or a nasty person who does not take care of them selfs.
That's some nappie hair.
That's one nappie bitch.
That's one nappie fro.
by D-Rew Rappen April 18, 2008