True, although this isn't official in any capacity, and the physical coin is still not a Bitcoin. It has a code etched into it, but the code is representative of a digital currency. For this matter, you could write the code on a Post-It note and achieve the same thing.
Thanks for asking. Pogs are thin cardboard wafers - often decorated with 90s cartoon characters. Slammers are thicker heavier wafers, which get thrown at a stack of Pogs to try to flip them. The game plays a lot like "marbles", overall.
I don't know if it's on purpose, but the metal "Bitcoin" coins that were being sold for awhile happen to be the right size to make decent "slammers" for the game of Pogs.
I used to work for a rural bank in 2017 when BTC first (?) passed 20k and was all the rage. The amount of customers (and coworkers!) asking how to deposit some in their lockboxes was really staggering.