KWC is an acronym for: Keys, Wallet and Cellphone
KWC Check is a kind of a quick process where you check if you have your Key, Wallet and Cellphone with you or not in relevant situations such as when leaving your home for work, or while leaving a party or a friend's place or a restaurant.
Have you done your KWC Check?
Oh shit. I forgot to do my KWC check before leaving. Now, I don't have my wallet with me :(