against air
other.— «He recounted how he’d watch other teams warm up before games, and how those opposing quarterbacks would have problems completing like 70 percent of their passes “against air,” which means in the football vernacular no one defending the receivers.» —“One Last Look At Troy’s, Rayfield’s Big Weekend” by Mickey Spagnola DallasCowboys.com Aug. 6, 2006. (source: Double-Tongued Dictionary)
Further reading
The word filibuster has a long and colorful history, going back to the days when pirates roamed the high seas. Today it refers to hijacking a piece of legislation. Plus, the language of yoga teachers: When doing a guided meditation, you may hear...