149
Toilet Rule
(lemmy.ohaa.xyz)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
Unfortunately not though, because "American" is already used exclusively in reference to the USA. There is no adjective to refer to things from the Americas collectively. One of these two possible uses is extremely common and the other is extraordinarily rare. If you need the rare option, you need multiple words and can't shorten it.