An idiot. Someone who fucks up all the time and never succeeds in life. Deemer's generally fail at life, over and over again, yet never realize it.
"Hey man, I heard Mackenzie got pregnant again, even after she took 9 weeks of that Abstinence course."
"What a deemer!"
by Connor Dui April 16, 2008
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Somebody who has a deep obsession with midget porn.
Andy: I've not seen Paul for a long time
Ross: He's locked himself in his room with a terabyte of midget porn.
Andy: What a deemer
by ClownShoes42 January 6, 2012
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When something awful happens, which keeps you from having a sexual encounter for your first time, repeatedly. Can also be used to desribe sexual encounters not involved with your first time, but in which you still get so close then something happens preventing it.
"She asked me if I wanted to get head or smoke the bowl first. I said the bowl, so we stepped outside, and the door accidently locked behind us. We spent the rest of the night trying to get in. I never got head...looks like I pulled a Deemer"
by Shaunmark February 13, 2005
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An individual with an often mysterious past. Half of the time people assume it is because he has nothing going on. The other half of the time they believe he is some sort of superman because of everything he seems to have his hand in.

Either he is a complete sham, or a completely unique individual.
Guy A: "Dude, how the fuck did Deemer win the awards for physical fitness, intelligence, and aptitude?"
Guy (but usually Girl) B: "I don't know man, he's probably just a solid guy."
Guy A: "I think he's cheating."
Guy/ Girl B: *to themself* "At least he doesn't need to compensate for something by being jealous."
by Who posted this? January 26, 2012
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Exaggeration of the syllables in "Dime". Synonym for Dimebag. Also said as "Deem".
"That mofacky scored a Deemer of Dro!"
"Hell yes!"
by Pajewjew January 15, 2006
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BiG Deemer also know as big D is a man who's trust worthy and know for getting everything that he wants if something stands in his way he would destroy it and keeps moving on with his pride
Thats Big D for you

Big deemer is a real man
by Big d's sidekick February 26, 2016
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