1. A protruding upper lip seen prevalently in the homosexual community
2. An upper lip that stands out so much it can be called 'gay', This lip can often be the cause of other gay calling cards, such as a lisp. See Carson Kressley, Freddie Mercury, any homosexuals
'Wow look at that guys gay lip!'
'Are you sure he's gay?'
'Yes, he had a gay lip!'