look up any word, like lemonparty:
 
1.
Just Kidding, But Not Really.
"I'm going to get so drunk tonight I might just hook up with your mom. JKBNR."
by Johnny Haze August 03, 2009
 
2.
just kidding, but not really. used to suggest that the joke you just told was actually serious.
Jessica(who has naturally black hair): I heard that Ben has a thing for blond chicks, so I'm dying my hair blond. Jkbnr.
by littleinu May 14, 2010