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1. masu
A short form of Machinae Supremacy (Band)
Woo! I got some new MaSu songs!
by Trust Nov 26, 2004 add a video
2. Masu
A beautiful person who is intelligent as well as lowkey. A person who is extremely pleasurable and aggressive when engage in sexual intercourse
"All my life I wanted to be a Masu"
3. masu
a hook up.
They had masu after getting drunk at the party.
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