I just realized. 'lol' looks like a little man throwing his hands in the air. So it can mean either 'laugh out loud' or 'oh my gosh I am so frustrated right now!' or just 'exasperation'. Funny, isn't it?
To be fair, that site only lists street suffix abbreviations. Apt. and Bldg are also not to be found on that site. I, too, missed Fl. and would love to find an excuse, but alas, the failing is mine.
lol
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Call 911
https://pe.usps.com/text/pub28/28apc_002.htm