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1. noun. A state of such extreme sadness that all of one's blood rushes to one's nether-regions.

2. noun. A feeling of sadness paired with arousal.

3. noun. The feeling of regret one experiences after a bad hook-up, combined with a lingering boner or lady-boner.
"Dude, are you crying while also masturbating??"

"Don't judge, I have such a raging sad-on right now."
by Doctor Dan Drangus March 18, 2014
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