Someone that's so daft, childish, spineless, and devoid of self-recognition/importance that they will literally, and seemingly unwittingly, falsely incriminate themselves, all while showing no signs of concern, emotion or understanding.
You'd have to be a dassey to continue to let your ex be so verbally abusive and manipulative, after you've reached a settlement, that she has you convinced that she's the victim!
by Elios26400 February 4, 2016
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When one admits to doing something they most certainly did not do, due to a long interrogation process, utter stupidity, or a combination of the two.
Brendan was interrogated about a murder he was not involved in, but due to his lack of intellect and desire to get back to class for his project and watch Wrestlemania, he was dasseyed into making a false confession.
by Dr. Walter Fanchy February 4, 2016
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Someone who is completely stupid and says "Yeah.." to everything.
"Did you do 9/11?"
- "Yeah..."

Brendan, you fucking dassey. You were only 10 years old then!
by HardtailDrummer February 2, 2016
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