Pretty much everyone who travels often. Oh man, how I hate this airport.
Quick! What's MCO? You guessed it — Orlando.
It's a shibboleth in social media to show that you travel by air often. It's even sillier when Canadians do it because what the everloving crap does YYZ or YUL tell you if you don't already know what they mean.
its chicago. right off the bat. used to be the biggest layover place in the us. but generally CHI works too.