The word robabas is the imperfect form of robar in the second person singular. There are other translations for this conjugation.
See the full robar conjugation

robar

Bueno, ¿entonces por qué robabas pan y mantequilla de cacahuete?
Well, then, why'd you steal bread and peanut butter?
No tenías que dividir nada si lo robabas.
You don't have to split anything if you steal it.
No estabas llorando cuando te robabas a mis amigos.
You weren't crying when you were stealing my friends.
¿No robabas incluso cuando eras niño y morías de hambre?
Didn't you steal even when you were starving as a child?
¿Por qué fingirías que le robabas su bolso?
Why would you pretend to steal her bag?
¿Qué tipo de cosas te robabas?
What sort of things would you pinch?
Me dijiste que no robabas para él. No lo hice.
You told me you didn't steal from him.
Que me robabas en mitad de la noche.
Which you used to steal from me in the middle of the night.
Ví que le robabas a esa chica.
I saw you steal from that girl.
¿Le robabas a estas personas?
You stealing from these people?
¿Por qué robabas el banco? Por venganza.
Why were you robbing the bank?
Dime, ¿qué era lo que robabas?
What exactly did you used to steal, anyway?
Lo que sí, le robabas.
But you were stealing from her.
Y también la robabas.
Yeah, you stole it, too.
Lo que sí, le robabas.
No, I was not.
Y sé esto porque haber decidido que nadie iba a darse cuenta si robabas uno de mis cuadros de la colección veneciana...
Now I know this because having decided that no one's gonna notice if you steal one of my paintings from the Venice job...
Porque le robabas sus tartas de jalea.
He'd like you if you stopped stealing his jelly tarts.
¿Nos dices que vendías en la calle los medicamentos que robabas?
So what you're saying is that you were dealing the pills you lifted on the street?
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict