Вообще-то правильный, вы просто плохо знакомы с английским сленгом. :)
См.:
http://www.urbandictionary.com/...term=get%20off
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This sentence was initially added as a translation of sentence #450740
added by Demetrius, August 3, 2010
linked by Demetrius, August 3, 2010
linked by rmdas, April 5, 2016