If you say "RPG", many people will assume a video game, not a tabletop game. Just saying "D&D" is fine to get around that in casual conversation.
I also say "Allen wrench" when I mean "hex key", and "Band-Aid" when I mean "bandage". Generally speaking, this hasn't caused many problems.
I also say "Allen wrench" when I mean "hex key", and "Band-Aid" when I mean "bandage". Generally speaking, this hasn't caused many problems.