YMMV
Your mileage may vary
Example
It worked great for me, but YMMV

Related Slang
IME | In my experience |
BME | Based on my experience |
Exp | Experience |
FTW | For the win |
U2U | Up to you |
CYA | Cover your a** |
Hot take | A controversial opinion |
IMHO | In my humble opinion |
MOO | My own opinion |
YMMV stands for "your mileage may vary." People use this phrase when stating an opinion or describing an experience, to note you may have a different opinion or experience.
Where does YMMV come from?
The phrase "your mileage may vary" comes from automobile advertisements. In auto advertisements, manufacturers typically state a car's average gas mileage. However, to CTA, they also state YMMV - to note your car may not achieve the same average mileage.