look up any word, like the eiffel tower:
When it gets to be summer time and people get sun fever thinking they can wear whatever they want...Fun in the sun mostly refers to bigger people who walk around with clothes that are too small and they think because its hot, its ok.

Sun can be an interchangable word like fun in the club etc
Everybody wants to be fun in the sun!
by RMCG July 24, 2008