pissin' hot
Used mostly within the gun community, it refers to ammunition that has been reloaded by an amateur gunsmith and is defective and usually contains too much gunpowder. Pissin' hot ammo loads also present a danger too the firearm and user if the ammo is poorly manufactured.
"DARYL! YOUR AMMO JUST BLEW UP MY DAMN RIFLE!!!"
"That's them pissin' hot reloads, I tell ya.
"That's them pissin' hot reloads, I tell ya.