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when something is so fucking good, nothing can come after it.
Tim: Man, that porno was awesome!
Connor: Tell me about it! That's dunsun, right there!
by tim808 February 03, 2009
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2
1. To be completely finished with someone or something

2. To abruptly end a conversation or diss without the chance of a rebuke

This phrase was originated from the best spring break cruise EVER...DUN SUN!

"Guys, I just dropped a huge shit in the bathroom...DUN SUN!"

"The neighborhood just ran a train on your mother...DUN SUN!"



by C-Rizzo & J-Diddy February 08, 2009
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