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1 definition by shaunsdu

verb: To put something out of it's misery. As in the ending of the Disney film Old Yeller, where the young boy puts a bullet between the eyes of his beloved pooch who's gone rabid or old or something.
This girl I hooked up with the other night thinks we're in love or something, I'm gonna hafta old yeller her.
by shaunsdu September 08, 2008