Other forms: carousing; caroused; carouses
Carouse means to drink a lot of alcohol and behave in a loud, exuberant way. The neighbors will not appreciate it if you and your friends carouse in the backyard until dawn.
Carouse comes from the German gar aus trinken meaning “all out," “drain the cup” or “drink up.” The English adopted the word in the 16th century, and it came to mean “sitting around drinking until closing time.” A noisy drinking party is sometimes called a carouse.