A more gratuitous derivative of the simple Your Mom, in which someone describes having sexual relations with another's mother in an attempt to offend or shock them. While it almost always used either sarcastically or as a form of trolling, it can also be found being used by typical players in online gaming matches who have decided that actual insults simply did not display their rage thoroughly enough.
A phrase implying that the person saying it "knows" your mother, but in the biblical sense; and that your mother is a woman of easy virtue. Interpretation depends on the context, of course. In the long tradition of putting down someone else's mother as a way of putting them down. Alternatively, just "say hi to your Mom."
The definition of punk rock. Whenever something is called into question as to whether it is indeed "punk rock," simply ask the question, "Would your mom like it?" If the answer is NO, then the subject is indeed PUNK ROCK.
Punk 1: That guy just took a shit on the stage!! Is that punk rock?