Top definition
Someone who is always trying too hard to be funny and entertaining around people. They don't seem to know how to turn off their performer tendencies and be more relaxed and normal.
"John can get tiring to hang around. He's always on, and making jokes or doing impressions and trying to be the center of attention. I can't think of whether I've ever had a normal conversation with him or not."
by JCR1987 August 21, 2014