4 deep
A more "gangster-oriented" term which suggests that a group of people (clique) are together in a certain environment, mainly a car. The number can vary depending on how many people there are in a given area.
Those niggas were riding 4 deep in the '69 Camaro.
My homie is having a party. They are 20 deep in the hotel.
My homie is having a party. They are 20 deep in the hotel.