burglar's moon

Not necessarily a full moon, but nearly - gibbous. So named because it's nice and bright so you can see what you're upto whilst doing somebody's drum at night.

Actually a pain in the arse because it makes it more likely that you would be seen clearly whilst perpetrating the crime.

Gran: Burglar's moon tonight...

drummer: Yeah Gran, but I'll take a maglite anyway, for when I get inside a place.