bar tan
The red-faced, hangover appearance after a long night of drinking.
Dude, Larkin stayed out late and showed up at work sportin' a bar tan.
Asian bar tan
Characteristic red face and neck that some Asian people get when drinking alcohol. The reason for this is not allergy, but because of a defective enzyme, acetaldehyde dehydrogenase, which breaks down a byproduct of alcohol metabolism, acetaldehyde, into acetic acid. Thus, the acetaldehyde levels build up and cause the skin flushing, rapid heart rate, and sweating.
Look at that lightweight, Chan... he's only had one beer and he already has an Asian bar tan.
Bar Room Tan
After years of abusive drinking a persons blood vesels in their face burst and become damaged resulting in a red face and large bulbus red nose.
That guy has quite a bar room tan.