Tubba
A nickname for a guy that carried a little pre-adolescent weight. This 'nickname' can catch on and follow the guy around throughout his adult life despite his current appearance.
Old school friend: OY! TUBBA! How ya doin?
Tubba: I joined a gym, lost 5 stone and now I run marathons.
Old school friend: Nice one, Tubba!
Tubba:*sigh*