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When someone is a little too attached to their friends, and calls them 3 times a day, and doesn't stop talking on the phone when you do pick up.
"Is that kid your friend?"
"No, he's a Sepan."
by SocialDictionary.com June 26, 2007
13 4
1.A sepan, is knowen as a person that cant grow out of the imature phase of life and basically stay in the imature phase for a longer time than the average person.

2.A name used to describe an over weight oaf that lets him self belive he is muscular.
1."that guys so imature,what a sepan"

2."IM SO MUSCULAR IM NOT FAT"..."what a sepan"
by Word inerpretter. July 29, 2009
8 2