This crazy mess was heard on a conference call. It is a mash up of “hot potato” and “playing with a live grenade”, both describing something dangerous or difficult to deal with. The speaker was urging people to move problems along. The speaker may have also been thinking of the German hand grenade called the potato masher. The Model 24 Stielhandgranate was the standard hand grenade of the German Army from the end of World War I until the end of World War II. The very distinctive appearance led to its being called a “stick grenade”, or a “potato masher” in British Army slang. Thank you to Yvonne Stam for hearing this one and passing it along, so to speak….