What is Massderbash?
1.
1-To
2-To beat someone down in
1- guy one: "Geez, i thought your penis was going to fall off, you were massderbashing pretty hard"
guy two: "yeah, i was stressed out, now i feel fine"
2- guy one: "HAHA did you see that?! i assassinated him from the air!"
guy two: "Thats called massderbashin, genius."
See