Call on line two Share definition Flag the excuse that is used during a conference call when the sound of a flushing toilet is heard in the background. (sound of toilet flushing) Bob: "What was that?" John: "Sorry, I had to take a call on line two" Call on line two by PoorDavid January 16, 2012 0 0 Get merch Get the Call on line two mug. Buy Now — $32.95 See more merch