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1.
When a person using chewing tobacco for extended periods of time the inside lip and lower gumline become calloused with a wrinkled appearance. This is known as a gator lip.
dammit leroy i done been chewing this nastiness for near 10 years now and i'll be god damned if this aint the worst ol' gator lip i seen.
by stephen applebee August 20, 2006
 
2.
One who possess very dry, large, reptilian lips.
Look at the fucking Gator Lips on that thing.
by Reid Street Gang May 05, 2009