Common term for someone who, although good intentioned, lacks the personality trait known as fun. Spontaneous things scare them and any sign of trouble usually results in hours of sci fi gaming and/or hibernation. A law dawg would rather read history books than to participate in parties, sexual encounters, or sporting events.
"Dude, that was a raging party last night...where did Dan go?"
"He thought the cops were going to bust it so he locked himself in the bathroom with Mein Comf"
"What a Law Dawg"