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dong t mass is used on the streets of haverwick massive, it is used to describe a realy unsafe person or as an insult when you are pumped. but watch your mouth, as this is probaly the most offensive insult to hail from the haverwick turf!
"that MC massive crew are right dongs t mass!"

"you fucking dong t mass! you cant do that while del pieros on the ball!"
by haverwick mass December 09, 2004