look up any word, like guncle:
 
1.
The couple name for Joe Jonas and Demi Lovato. Many speculated they have been dating since they met on the set of Camp Rock. Recently Demi confronted the rumors and said it was true.
"Jemi is the new Zanessa."
by lovemileyyyy March 15, 2010
 
2.
Demi Lovato and Joe Jonas 's name put together as a couple

More info below

www.jemistry.wordpress.com
"Im such a huge Jemi fan !"

"Jemi's new baby is here !"
by MrsJoeJonas March 06, 2010
 
3.
A very handsome strong male, who can attract any woman in sight. Also very good at everything wether it be games or driving "he" will always be the ultimate.
Damn that kid sure is one hell of a "Jemi"!
by Robbbb October 14, 2006