A gap filler often placed at the end of a sentence or in order to complete a thought; carries no significance.
The origins of "but yeah, duded" are not completely known. It is believed to have started in small circles and gained notoriety through the internet.
Derived from "so yes" and "dude". "So yes" is simply used when people have nothing to say; "duded" is the misspelling of "dude", a reference to the person you are talking to. People who often say "but yeah" avidly misspell words.
Kevin was invited to Emily's house in order to watch old Law & Order episodes. However in the middle of the episode Kevin became too enthralled and knocked over Emily's prized trophy. Emily became so mad that she bit Kevin, which caused Kevin to proclaim "you bitter (sic)." Upset by what had just unfolded, Kevin decided to leave and go home. He was upset at society's injustices and decided to let it have its own way. At home, he invited Sharyn over, but she could only come next month because there must be a month's notice before anyone can come. But yeah, duded.
First you cut a hole in the bottom of a popcorn bucket and insert a particularly small penis through said hole. Then you surprise your movie theater guest with it.
Tony went to the movies quite often with Medusa, but one time in particular he MILK DUDED the popcorn bucket. Not only did she not find it amusing, she didn't even find it.