As a weapon of precise aim, I'm often associated with a board on a bar's wall or with the toxic potential of a jungle frog

I am a dark shape against the light, with no fine features shown in sight. Not the shadow cast at your feet, just your outline, dark and neat.

You’ll find two versions of me in your bathroom; one you’ll use and one you’ll want to get rid of. You may find me useful in your kitchen, and I’m often held by a blindfold-wearing statue.

I always go through a door, but I never go in and I never come out. Some use me to peek at what they shouldn’t. You slide a metal tool into my belly, but I have no stomach.

I spray and leap and fall and swish Without ever moving, and may grant a wish! Penny for your thoughts: what am I?