one over the eight

"One over the eight" is an idiomatic expression that typically refers to being slightly drunk or intoxicated. It originated from British slang and is derived from the fact that on a traditional British pub dartboard, hitting the number one, which is usually located above the number eight, is considered a poor shot. Thus, "one over the eight" suggests someone has consumed enough alcohol to impair their functioning, but not to a severe or dangerous level.