It's an interjection/slang in Brazilian Portuguese.

'Eita' is an interjection commonly used in the southeast region of Brazil, suggesting awe or surprise or even conformity.

And 'que tiro' literally means 'what a shot'.

When they are thrown in the same sentence, usually means the sayer is in awe, while looking at an attractive person.
Situation: an attractive someone posts a nice pic on instagram

One says: Eita, que tiro!
by Narcisa92 August 2, 2017
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