Emmer Effer is the phrase used when it is not appropriate to say mother fucker. It is most likely used when something you do goes wrong or describing someone who is one crazy emmer effer.
Person #1: Did you see that girl do a keg stand for a whole minute?
Person #2: Hell yeah she is one crazy emmer effer!!
OR....
Person #1: Are you ready for the test today?
Person #2: Emmer Effer!!! I forgot all about that.
by ttirby February 15, 2010
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What wholesome people say to avoid swearing.
Grandmother: Oh, mother effer, I just burned my hands on this apple pie!

Granddaughter: Mother who?

Grandmother: Ahhh... Mrs. Effer... yes, she lives down the street. (Runs away.)
by Joel67 April 27, 2007
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A cuss word that starts with E, it could also be effing or eff, if people say no cuss word starts with E, show them this
That Mother Effer, Why am I so Effing Stupid
by I_Eff_Your_Mom July 18, 2023
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