'Amerme' is not a commonly recognized Spanish slang term. It seems to be a misspelling or typo. However, it could be a combination of 'a' (to) and 'merme' (a colloquial term in some regions for 'friend' or 'buddy').
Examples
- Spanish: Voy a salir a pasear con merme.
- English: I'm going to go for a walk with my buddy.