a boyfriend who is sexy smart and fantabulous. They are just a really great person to have as a boyfriend.
Hey do you know dermot..?
oh yeh he's katies smextabulous boyfriend!!
by katidude May 22, 2008
Top Definition
A guy who is as sexy, smart, and as fantabulous as can be.
Do you know who Katy is dating?

Yeah, her smextabulous boyfriend Liam.
by mystery321 February 28, 2011
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