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1.
A very selective group of young people who go out often to get plastered or high.
-Are you part of the COTH group?
-I sure am.
by dorito April 05, 2005
 
2.
archaic variant of the word 'both', used when instead of affirming two things, you are agreeing with/to three things
'What's wrong? Are you sick/cold/hungry?'

'Coth'
by a very random person February 22, 2005
 
3.
a punk that goes from punk to preppy
one more coth for the pack
by Ginny Vengeance August 29, 2008