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)
Further reading
If you take your finger and run it down your breastbone, and the end, there’s a little pit. In the 15th century, that little hollow just after the bone was called the heartspoon. This indentation is also called the pit of the stomach, or epigastric...
Fans of the popular British baking show know that you don’t want your many-layered cake to concertina, or “collapse like an accordion.” The verb concertina, in this sense, derives from the name of an accordion-like instrument. This is part of a...