What does !ven aca! mean?
Welcome to the Forum, yeemeister!
Dandi and Lucrecia are right. Here's something else you may find useful on this site. Many times (though not every) one of the words in an expression can be looked up in the dictionary and you'll see the entire expression explained. In this case look up the word acá, then scan down to find the expression you asked about.
I hope that helps, and we look forward to seeing you around!