Plural of man dime. An exclusive group to which it's members are very conceited and enjoy advertising themselves as man dimes. Members have mediocre looks and believe that they are total players, and they have chicks lined up to be with them. Members of the man dimes often take pleasure in playing basketball.
Keith: Hey Ryan are you a man dime?
Ryan: Frick ya man! I'm a prominent member of the man dimes.
Adrien: I don't know bout you but I've been dimin for quite some time now.
Ben: All the bitches want me.