A loserbeam is someone who is such a drastic loser that anyone who witnesses them cringes and feels horrible for them. People can only qualify as being a loserbeam if they mistake people's mockery for appreciation and therefore think they are cool.
Tom: "Do you get that sickly cringe feeling when you look at Seymour?"

Tim: "Yeah everyone does, he's a loserbeam."
by yourmumfailedatlife March 17, 2009
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