https://youtu.be/6YsNRnZRgg8

In the English Engineering System, the unit of mass is 1 pound mass (lbm), and is equivalent to the amount of matter that weighs 1lb at 1G. I won’t argue that EES is a good system, but it does at least have a kludged unit for mass. It has an equally kludged unit for force, too, called pounds force (lbf).

Encore in My Ass

Sadly no, it stands for “Ruchnoĭ protivotankovyĭ granatomet,” or “Hand Held Anti-tank Grenade Launcher” in English.