A very excited way to greet a fellow vent member.
The phrase stems from the game Dragonball Z: Budokai Tenkaichi 2 during the opening dialogue in a match between Tien and Yamcha. The characters scream out happily "LOOKIN GOOOOOD TIEN!" and "LOOKING GOOD YAMCHA!".
This event was so hilarious to MaxieMan that he just had to fish out a video to show to others on vent. Since then, a simple hello has become an occasional compliment with the adoption of "LOOKIN GOOD" as a vent phrase.