One Word is Back! Whoo! Prompt - Whistle

Yay! One Word is finally back! They provide one word, and you have sixty seconds to write whatever comes to mind. I missed this site so bad! I can't believe they're FINALLY back!

Whistle

You think you look so innocent there, standing back pressed against the wall, whistling nonchalantly all the while a large, cat-that-ate-the-canary grin twisting your lips. Who do you think you are fooling?