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"Beat Off, Pass Out"; To masturbate aggressively to the point of exhaustive ejaculation and enjoying a heavy nap immediately after said self-pleasure.
Example 1:

Me: "Looks like I have the afternoon off, think I might BOPO."

Example 2:

Student 1: "This class blows, I stayed up all night doing that paper!"

Student 2: "Sounds like you could use some nice BOPO."

Student 1: "No doubt, Bro."

Example 3:

Taylor was upset to find her boyfriend, Austin, had already BOPO'd on the couch when she got home from work because for once she didn't "have a headache."
by WhackShackWilly October 06, 2011
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3
Blacked out piece of shit. A person who drinks to the point where theyre memory shuts down and then completes several actions not capable of sober humans.

See hofbrohaus.
Man after that nep broke the beer pong table with his head we knew he was a true bopos.
by Freit house January 02, 2009
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4
Pronounced "boe-poe". The sequence of blacking out followed by passing out as a result of excessive alcohol consumption.
"I don't know what happened last night. I B.O.P.O.'d around 12:30."
by Brandon Nance February 16, 2009
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5
Acronym for black out pass out; a level of drunk where you have no consciousness and keep passing out.
I was bopo last night and woke up in my neighbor's tree house.
by Archand April 22, 2009
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