Definitions by TheRealJake

Sea turtle 

An athlete who is very old but still competitive in their sport. They often put off retirement as long as possible and seem to have the same several hundred year lifespan of a sea turtle, hence the name. Even after retirement they may still be identified as a sea turtle. Examples include Kobe Bryant, Tim Duncan, and Peyton Manning.

Man, I can't believe Tim Duncan is still playing. Dude is definitely a sea turtle.

Sea turtle by TheRealJake June 30, 2016