The word subiste is the preterite form of subir in the second person singular. There are other translations for this conjugation.
See the full subir conjugation

subir

Y te subiste encima de mi mujer al mismo tiempo.
And climbed on top of my wife at the same time.
Sí, conocías el trato cuando subiste a bordo.
Yeah, you knew the deal when you came on board.
¿Cuándo fue la última vez que te subiste al ring?
When was the last time you were in the ring?
Te subiste a la cima de ese edificio.
You got up on the top of that building.
Bueno, yo estaba aquí y luego tú subiste.
Well, I was here and then you came up.
¿Te subiste alguna vez en la pared de una ola?
You ever get in the pocket of a wave?
Esto no es una negociación, y subiste.
This is not a negotiation, and you went up.
Mamá, no puedo creer que en verdad te subiste a un avión.
Mom, I can't believe you actually got on a plane.
Parece que te subiste a un árbol, pequeñita.
Looks like you got yourself up a tree, little bit.
No dijiste ni una palabra desde que te subiste al autobús.
You haven't said a word since you got on the bus.
Y recuerdo la última vez que subiste a una de esas.
And I remember the last time you got on one of those.
¿Cuándo fue la última vez que te subiste al ring?
When was the last time you were in the ring?
¿subiste al zipper cuando estabas embarazada de mí?
You rode the Zipper when you were pregnant with me?
Así que podrían hacer cualquier cosa una vez que subiste.
So they could do anything, once you're on there.
¿Por qué te subiste a un ascensor que está subiendo?
Why are you getting on an elevator going up?
No me digas que subiste al dormitorio equivocado.
Don't tell me you climbed into the wrong bedroom.
Pero, si no era un taxi, ¿por qué te subiste?
But, if it wasn't a cab... Why'd he let you on?
Me hubiera gustado ver sus caras cuando subiste a bordo.
I'd liked to have seen your face when you went aboard.
Nunca te subiste a una en tu vida.
You never got on one in your life.
No dijiste ni una palabra desde que te subiste al autobús.
You haven't said a word since you got on the bus.
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