1. What you do with your winter coat upon entering a danceclub.
"Avoid after-hours chills and loss of property during Chicago winter. Instead of wrapping a sticky barstool with your pea coat—just check it! Upon arrival to any nightclub, this chore comes first. You can work the room, flirt with the bartender, or go trainspotting *after* your coat is in a safe place. At the end of the night when you pick it up—be sure and tip the attendant well."
2. A section of a pattern made by rectilinear repetition.
The lady's Burberry handbag sported the company's trademarked check pattern.
3. The act relating to the various transactions of goods/services for legal tender generally exchanged between cashiers and customers in "check-out lines" which provide a convenient setting for this process (usually seen near the exit of supermarkets, retail department stores, etc.)
Brandon - "Bruh why you gotta check me!!?"
Me - "Britney you need to be checked for that shirt, it looks like a dirty dishrag"
Advanced users may make a more complex coding system such as check-plus, check-minus, j-check, s-check etc which may be user defined.