Top definition
Someone or something that after a long period of time, reaches a higher level of potential, or success.
I was a very shy and meek kid in high school, but when I reached my 20's, I came out of my shell and became very outgoing. My friends told me that I get the sleeper award for how social I've become.
by The sleeper. September 11, 2013
Get the mug
Get a sleeper award mug for your mate Callisto.