Stands for "escape from reality". The act of getting so insanely high that one believes that they have escaped from the real world. A state of mind that can truly be recognized from anything such as a strong acid trip, MDMA, marijuana, shrooms, or any other means of entering a tangent universe.
Mike: yo dude I just got some shrooms, wanna e.f.r.?

Anthony: hell yea dude i'll call you when I am off work
by littlecosmonaut June 28, 2012
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Stands for "Eat Fuck Repeat". The routine / state of mind that one can live in.
Doing nothing more in life than fucking. The Portuguese Way.
Fábio: yo dude I just spent my last week in e.f.r. Mode.
by LD'#Sofia September 26, 2017
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