Metaforical goggles, believed to be "worn" due to imbibing to much alcohol. Specifically, the enhanced visual appeal of women who would be considered fugly when sober.
"Sure I can see she's a double bagger now, but I had them beergoggles on last night."
what you are wearing when you sleep with mrs simpson
i nailed mrs simpson but, i was wearing my beer goggles (a 12-pack worth).