Top definition
When someone dies and despite them being a deadbeat piece of shit you switch and act like they were a good person.
Person 1: Why the fuck is everyone acting like X was a good person?

Person 2: It’s called X Syndrome.
by slutdaddydaniel April 22, 2021
Get a X Syndrome mug for your mate José.
Jul 2 Word of the Day
Someone people turn to when they're sad who makes them feel better.
Dude, I was so unhappy about my girl, until I spoke to my serotonin donor who really helped me feel better
by jonfurstn1 November 27, 2009
Get a serotonin donor mug for your girlfriend Nathalie.