Can beer “go bad”? No, beer has no use by date, meaning it is safe to drink well past the best before date. Beer won't be dangerous to drink, but the taste of the beer will deteriorate over time.
Yes, Bud Light does expire. Anheuser-Busch (A-B), the company which produces Bud Light, gives the beer a shelf life of 110 days. Although you can technically still drink Bud Light after its expiration date, its quality drops after this time and degrades even further after six to nine months.