2 definition by EthanTheEthan aka The Jew

Top Definition

Where you take your Master Card and slide it through your partners butt crack and lick the poop off it.

John: Hey Amy I got my Master Card today, do you want to master slide?
Amy: Yeah sure
John: Ok, you can lick the card

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When your friend text you and you annoyed by them so you just reply with "Mmmk"

Ethan: can you help me with my homework?!
Other Ethan: Mmmk...

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