Counter hog is someone who takes up space at counter for a long time,not allowing other people or friends to use it when there is plenty of room. The overuse of a shared counter.

When you're at a coffee house and need to put sugar,milk, etc in your coffee or tea there is a big counter where you go to to get it. If it takes a person more than 45 seconds to complete their coffee order, they are a counter hog.

When you're on vacation with friends, or away somewhere getting ready. usually woman, but sometimes men can be counter hogs too. There are usually a lot of people that need to get ready to go somewhere, bachelorette party, weding,etc. The person that takes a long time and doesn't share the "get ready" space.