Yes, but skip the filter if you want to do less work and get more coffee in your coffee
Put the grounds in the mug. Pour water. A bit later, stir with a spoon so you have less floaties. Enjoy a mug of tar. Chewing on the grounds later is optional.
We call it "thief's coffee" in Estonia, because you don't have much time to spend on making coffee when you're robbing someone's house, but you still need the caffeine fix lmao