burping bedpost
n.— «Because I played an instrument during concerst season that was “inappropriate” for marching (the wonderful burping bedpost, also known as the bassoon), I was relegated to the Pit section.» —“My Only Gong Story” by LadyRoo of Elight’s Kingdo Usenet: rec.arts.marching.misc July 14, 1994. (source: Double-Tongued Dictionary)