Masterflexing
The act of masturbating and taking a dump at the same time
I was masterflexing all over her before.
cunt masterflex
some 1 who is a big ass twards u. or some who messes ur joke up
guy1:you check out my out my package
guy2: you mean your penis
guy1:no cunt masterflex i really ment my package from the mail
guy2: you mean your penis
guy1:no cunt masterflex i really ment my package from the mail