The "two stinkies" gag is the favorite saying of Goliath Dog, who usually does't leave two stinkies. Then why say it? Nobody knows. It is thought that GD has been hit on the head with something. Or perhaps it is all those sodas talking. The TSG has been spotted in the Homestar Runner Wiki, andin one of Hagurumon's emails to Strongbad. Below is a list of its sightings.

The Cheat's Security Cameras 2.0 Debut
Hawkeye123's Character Tape
Hagurumon Email 3