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1.
Sel
Salt in french, formerly known as this kid at school that is odd. But funny.
"Yo, Sel."
by Bobishness April 06, 2003
 
2.
Acronym for South East London, pronounced 'sell'.
"You from East? Nah, blud I'm from S.E.L. init."
by Toulewd November 16, 2013
 
3.
Sel
An abbreviation used by people who are too cool to use the word 'selfish'
"Stop being sel!"
"He is so sel"
by Lozza gy August 18, 2011