Two friends are sitting in a café, chatting.
I mean, he’s a nice guy, but a bit OCD.
A man, who had been waiting for his drink, approaches them.
Sorry, but I couldn’t help overhearing. Would you mind repeating what you just said?
Erm, that this guy is nice, but a bit OCD.
Right. Now could you think, just for a minute. What does the acronym stand for?
Erm, Obsessive Compulsive Disorder.
Exactly. Your observation is syntactically void. You can’t be a disorder; saying that someone’s OCD is akin to saying ‘she’s a bit asthma’ or ‘he’s quite hepatitis’. The English language is there to decline; don’t butcher it for lack of care.
Having said his piece, the man walks off.
The friend turns to his companion.
Told you he was OCD.