So as someone who has obsessive-compulsive tendencies but definitely not OCD I would define it as such: OCD is when your general functioning is noticeably and demonstrably impaired by your obsessive-compulsive behaviour.
I can get stuck in loops sometimes and I can get hung up on things, but I've seen people with actual OCD around when I've been at my psychiatrist's clinic and it's different.
I'll take anybody but MBS at this point.