Based off of an inside joke from a video MiniLadd posted.
By refering to "The Machine Gun", they are referring to a Youtube adult streamer who sold her socks for coins to buy a "Machine Gun" which is a quick moving sex machine.
Black Card: Word to the wise, never put ______in your vagina.
White Card Placed by 'mininumber1' : The Machine Gun
THE INSIDE JOKE TO RULE ALL!! - Cards Against Humanity- MiniLadd (7:27)
A very expensive, electronic dildo. Some may have to sell their socks in order to afford it.
Hi, I'm Billy Mays here to introduce you to The Machine Gun! But wait, there's more! Order one right now and get a free pair of socks!
When a guy is getting a blow job from a random women, pulls out, and blows his load all over her face while holding his dick and screaming Ratt-A-Tatt-Tatt!
Also known as the Rambo and the Frustrated Elmo
I don't think that girl will ever talk to me again after i Machine Gunned her.
That girl got really pissed when i showed her the Machine Gun
When a guy gets a BJ from a random woman and pulls out, nuts on her face, and screams RAT-TATTA-TATTA
Friend: Hey man what did you do to her last night?
You: Oh I just gave her The Machine Gun all over her face
"The Machine Gun" is when a guy gets a BJ from a random woman, and pulls out, nuts on her face, and screams RAT-TATTA-TATTA
Hey girl, wanna see The Machine Gun, (7 min later) RATATATTATATATATAT!!!!!!
The Machine Gun is when you getting ready to cum on a girl's face and saying "BRRRRRRRRR" as you cum.
Dude, I did The Machine Gun so hard on her last night!
That one inside joke from YouTube Miniladd's that not of us got.
You came here hoping for an explanation of machine gun didn't you? Too bad I guess we'll never know.