motherfuckerly 

To say something like a motherfucker, or to perform an action like a motherfucker

You said that motherfuckerly!

motherfuckerly by Willycat00 October 6, 2016

Crispy Motherfucker 

Someone who can be classified as an asshole that gets roasted through the 6th dimension.

Popularized by Youtuber Mythymoo as an insult towards another Youtuber, Kevox.

Dellado: Hey Myth, look at this play i just made
Myth: Is it good?
Dellado: Yes!
Myth: Stop lying to me you crispy motherfucker, the only good play you have ever made was getting into America, and you still have scars from that day

Crispy Motherfucker by DomTheDomo October 20, 2016

English, motherfucker, do you speak it? 

Spoken, usually screamed, at someone who has failed to speak or write understandable English. Sometimes bowdlerized as "English, do you speak it?" or misquoted as "English, do you speak it, motherfucker?"

Arguably the most famous line from the iconic 1994 film Pulp Fiction. Ironically, the original line was not asked in response to someone speaking incorrect English, but asked by Samuel L. Jackson's character as a rhetorical question to whether or not a frightened man spoke English at all after the man repeatedly said "what?" to his questions.

"What country you from?"
"What?"
"'What' aint no country I ever heard of! They speak English in 'what'?"
"What?"
"English, motherfucker, do you speak it?"

English, motherfucker, do you speak it? by BlackDoomShadow December 16, 2008

Like a motherfucker

Used to indicate an unusually high degree of intensity. See gangbusters.

Whoa, have you looked outside? It's raining like a motherfucker.

Let's stop at a gas station; I gotta piss like a motherfucker.

Like a motherfucker by R. R. July 6, 2005

Brain Dead Motherfucker 

An absolute Dolt. Someone who doesn't know their ass from a hole in the ground.

Man, you're one Brain Dead Motherfucker for doing that.

Brain Dead Motherfucker by JimmyOre July 7, 2009

Real motherfucker 

Real motherfucker, someone who always commits to whatever they are doing.

For example, yo did you see Steve knock that guy out who checked out his girls ass? He's a real motherfucker

Real motherfucker by Mickylad97 May 22, 2018

Mount Motherfucker

Known primarily among Marines undergoing training at the School of Infantry at Camp Pendleton, California as the least desirable place to hump a pack. Tops off at "Recon Ridge". Named as such because when you are going up, your thoughts consist of little more than "motherfucker..."

PFC. Smith: Fuuuck, we're doing what for PT today?
PVT. Johnson: A pack run up Mount Motherfucker.

Mount Motherfucker by usmcvegas January 9, 2010