Would a player ask if 18 hits when that is just the roll? I'm kinda unfamiliar with TTRPGs but I assumed the player usually kept track of and applied their modifiers, or is the DM tasked with that?
Yes, assuming we're talking about DND, the player is asking if his total attack roll with modifiers is equal to or greater than the enemies armor class, which only the DM knows. If so, the attack hits. If not, it misses. An AC of 19 or more is pretty high for low level player characters.
My confusion was that the meme said rolls an 18 and the title said 18 doesn't hit, which makes it sound like in one instance its referring to the roll and in the other the roll with modifiers, but I'm unfamiliar with the parlance.