reverse swallowing syndrome

Reverse Swallowing Syndrome, aka RSS or RSD, is a rare condition where when you try to swallow something, you end up spitting it everywhere. If you want to swallow something, you have to act like you're about to spit it out. It's a rare condition happening to 1 in a million people. Often you'll forget you have it and get in trouble

Person 1: Dude, what the fuck!? Why did you just spit your Mountain Dew all over me?

Person 2: Sorry, I have Reverse Swallowing Syndrome
Person 1: That's bullshit, there's no such thing
Person 2: Ableist!! Look it up idiot