Mother fern 

Mother fucking pothead
OR
Mother fuck(er)
OR
Mother pothead

Teacher: Today we will have a pop quiz.

Student: I HATE YOU. YOU MOTHER FERN!

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Friend 1: That mother fern has nothing to do but snort coke.

Friend 2: Yeah, what a mother fern

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Brother: What a mother fern.

Sister: Why is she a mother fern?

Brother: Because all she does is do weed. What a mother fucking pothead (mother fern).

Mother fern by AZN-.-RiceGirl403 March 22, 2009

Motherfornicator 

1. Used like motherfucker, but to be less offensive,

2. a way to say motherfucker around undereducated people and seem intelligent

1. Hey, you motherfornicator, you robbed me!

2. Semi-educated person: Damn, man, that motherfornicator has a nice car.

Under-educated person: What the hell? He's a fornicator?! Are they from the West Side?!

Semi-educated person: I meant motherfucker........

Motherfornicator by masticator0530 September 11, 2011