"Travis" is a name, but in this case is used as a synonym for a green flag, or person that sets off GOOD alarm bells in your head. You could trust him with your life.
Scenario 1:
Dude: Oh my golly goodness, my mother is dating such a Travis!
Other dude: That's awesome sauce!
Scenario 2:
Dude: That dude over there just advocated for LGBT rights-