Ymmv

[Sarah]

Literally means Your mileage may vary but is often used in forum talk meaning that your results will vary

[Justin Bieber]

Your Mileage May Vary

[Sonia]

Internet shorthand used to represent your mileage may vary meaning how far you will be able to go depends on (usually external) factors relating to yourself, such as locality. Often used in deal forums to indicate that the OP (original poster) was able to complete the deal but it is unlikely or uncertain that others will be able to do the same. Can also be used to represent your market may vary which is more appropriate for internet deal forums and more easily translates to some, especially people foreign to the english language. Often used in internet forums to indicate the likelyhood of something happening is uncertain.

[Sarah]

Used in forum discussions for deals. Means Your Market May Vary because some big chain stores only offer deals in specific markets or products may sell out fast in your market area. Also translated as Your Mileage May Vary by people who dont know what they are talking about.

[Donald Trump]

Your Mothers Musky Vagina