A mix between transient and complacent - to be self-satisfied and slightly arrogant, but in a thoughtful way.
Dude: I'm feeling really happy with everything, I kicked this guy's ass, I burned this building down, and I had a really great time doing it, but I can't help wondering why people have a problem with me.
Dudette: You seem very transplacent today.
Dude: Yea, I guess I am.
Another dude: Yea, feeling fine, feeling perhaps a tad transplacent.