As we’ve noted, in California’s Orange County, to birdie means “to drink from a bottle without touching it with one’s lips.” Elsewhere this germ-avoidant act is also called airsipping, airing, baby birding. In parts of the UK, you might sky a drink...
Birdie means to drink from someone else’s bottle or glass without letting your lips touch it, as in “I’ll birdie it.” The same maneuver is also called waterfalling, because the drink is poured through the air into your mouth. Other reported names...
