Don't @ me. Usually used when you say something commonly disagreed with that you won't change your opinion on, or don't want to hear other peoples' opinion on. Often used as a joke or with an obviously exaggerated/satirical opinion.
"Batman Vs. Superman was the worst movie I've ever seen D@M"
"If we killed everyone who's ever said 'yaas' the world would be a better place D@M"
To steal, or take away from someone forcefully. (Stemming from the common thug's propensity to say "Dismine!" or "Dat mine!" as he's removing your property from you.
Quick, call the cops - two inner-city kids just D.M.ed my bike!!