beer goggles

metaphorical goggles that one wears after excessive consumption of alcohol, and that cause diminished judgment, particularly in encouraging one to be attracted to and flirtatious with someone one would not ordinarily find attractive: I bet he was wearing beer goggles when he left the party with that loser.I was sure the Sox would make the playoffs, but I was obviously looking through beer goggles.

with one's beer goggles on informal seeing people and things as becoming increasingly attractive as one's alcohol intake rises