While performing the act of intercourse, one covers his eyes in a way reminiscent of Judge Dredd's helmut (to be done with any object including one's own hand), whilst utterring repetiously, "I am the law. I am the law" etc.
Most common uses of the Judge Dredd:
A. Shielding one's eyes from the unattractiveness of the person being sexed, for it sometimes exceeds the convenience of placing a bag over head.
B. Fulfilling one's girlfriend's fetish of be dominated by make believe law enforcement officers.
Either way, justice is issued and law prevails.
"Suzy Q has a great body but kind of a man face. I had to pull a serious Judge Dredd to get through that intercourse session".
"My girlfriend has a thing for movie cops, so I surprised her during her birthday sex with some Judge Dredd"