You forgot the “F.” “Lmfao.” It’s a longer way to write a period, and can stand in for any punctuation mark. For example, as a period:
Not cool at all bro lmfao
Or as an exclamation mark:
INTERIM VERSUS EVERYONE LMFAO
Or even as a question mark:
Who wants to join the #winners amirite lmfao
It’s versatile, compact (only 5 characters, when before you might have had to, I dunno, hold shift or something to make your exclamation mark, or maybe let go of the caps key!) and most of all, Rhino-approved. So what are you waiting for lmfao