sounding rod

Noun

 * 1) A rod or piece of iron let down in a groove by a pump, used to ascertain the depth of water in a ship's hold.
 * 2) A probe used in.
 * 3) A sex toy consisting of a metal or plastic rod, generally with a ball at the end, which is inserted into the urethra.
 * 1) A sex toy consisting of a metal or plastic rod, generally with a ball at the end, which is inserted into the urethra.