The phrase "hang out" means to spend time relaxing or casually socializing with friends or acquaintances without any specific purpose or activity planned. It often involves informal gatherings, such as chatting, playing games, or simply enjoying each other's company.
The phrase "hang out" originated in the United States in the 1940s. The term "hang" implies staying or remaining in a particular place, while "out" indicates being in a more public or relaxed setting. Together, they suggest a leisurely time spent in someone's company.