over the eight 

badly drunk, having consumed more than the eight drinks which would usually be enough for the average person to become very merry

"I didn't think twice, I was three or four over the eight, I didn't care if the girl was a coyote date" from the song "You'll Do"

over the eight by Abel McCain December 16, 2008

One over the eight 

Extremely intoxicated (drunk or pissed, whatever your preference)

"Call her a taxi, will you? She's had one over the eight and needs to go home."

One over the eight by Alexandra July 30, 2004