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a televised donor call-in event wherein the sponsors keep 75% of the proceeds to line their own pockets, 20% is allocated for administrative costs, and the remaining 5% is given to the charity in question
Dude, I don't have cable and there's nothing on network TV tonight except this fuckin' telethon.
by dookeyboy November 22, 2010
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An endless phone conversation (a portmanteau of telephone + marathon).
My daughter was having a telethon with her boyfriend so I couldn't make a call for hours.
by Lorinc Szeredas July 06, 2008
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