Here's a breakdown of the phrase:
* Vas a invitar: This means "Are you going to invite"
* O qué: This means "Or what"
* Transa: This is slang, meaning "what's up" or "what's going on"
The phrase is a casual and informal way of asking someone if they are going to invite someone else to something. It can be used in a playful or a bit impatient tone.
The closest English equivalent would be:
* Are you going to invite them, or what?
* Are you inviting them, or are you just going to stand there?
* What's the deal? Are you going to invite them?
The tone of the phrase would depend on the context and the relationship between the speaker and the listener.