Verb. The act of hitting the back of another persons knee when their knee is locked, causing the person to stumble and possibly fall. There is also the muthasucka twofer where when you perform the act, the individual yells out in surprise, "muthasucka!".
"Man, when he muthasucka'd me I almost fell down those stairs! Imma muthasuck the shit out of him tomorrow!"
by Arfdawg April 1, 2011
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An unbreakable vowel, If said with no fingers crossed must be true or completed or else your the biggest itchbay alive.
Zack: “did you root that chick last night”
Harry: “Muthas I did”
Zack: “you can’t be lying then aye”
Harry: “Muthas I did”
Zack: “you can’t be lying then aye”
by Eshays2117 December 2, 2019
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