Booze/buːz/ Definition 1 of 2Pro Tip 1/3Slang Term Booze is informal slang and not suitable for formal contexts like business meetings or academic writing. Let's grab some booze for the beach party. Pro Tip 2/3Negative Connotation Sometimes 'booze' implies excess or disapproval of drinking. He's wasting his life on cheap booze. Pro Tip 3/3Party Association 'Booze' often associates with casual gatherings and parties. The invitation said to BYOB – Bring Your Own Booze.