me find is a slang that appeared on the internet and became quite popular on social networks. It means "find me" and is often used to represent the going out to a party or to show that determined person does not wish not to be found by another, making up a lie so that they don't discover his true whereabouts.
Example: "- And then friend, what's the good for the weekend? - Me acher!"
Thus, "mim acher" would be equivalent to "going out clubbing" or "having a beer with the crowd", for example.
Example: "Today I'm going out to have a beer with the guys and put the me acher on the boss".
The example above represents one of the meanings attributed to this slang: to set up a situation that makes it difficult to be found by "unwanted people".
This expression would have been created by the former football player Aloísio Chulapa, by publishing "me acher" as a photo caption where he appears surrounded by friends and beer, on his profile on Instagram.
With the success of this expression on social networks, it didn't take long for "me acher" to become a meme.
Learn more about meaning of meme.