The word subís is the present form of subir in the second person plural. There are other translations for this conjugation.
See the full subir conjugation

subir

¿Por qué no te sacás la coraza y subís?
Why don't you take off your armor and just come upstairs?
Por qué no subís a tu habitación y empezáis.
Why don't you guys head up to your room and get started.
¿Por qué no subís el escudo de calor?
Why don't you raise the heat shield?
¿Por qué no subís al coche, chicos?
Why don't you guys get in the car?
¿Por qué no subís y peleàis?
Why don't you come up and fight?
Chicos, qué tal si subís y os laváis las manos antes de cenar.
Hey, guys, why don't you go upstairs and wash your hands before dinner.
¿Y a qué velocidad subís?
And how quick are you getting up to?
¿Por qué no subís?
Why don't you come up?
Te subís ayer a mi auto.
You get into my car.
Entonces, ¿subís o no?
Are you getting on board or not?
Por qué no subís conmigo?
Why don't you come up with me?
¿Por qué no subís a cambiaros?
Why don't you go up and change.
¡¿Por qué no subís?
Why don't you come up?
Es fácil, te subís a un barco y te dejás llevar a Buenos Aires pero no se por qué nunca lo hice.
It's easy. You dimb on a boat and they take you there, I don't know why I never did.
En uno de los extremos de la plaza está la Porte Saint Thomas, que por un lado da a la Grande Plage y al Acuarium, mientras que por otro, si subís por la escalera, llegaréis al Camino de Ronda de las murallas de la ciudad.
At one end of the square is the Porte Saint Thomas, who on the one hand gives to the Grande Plage and the Acuarium while on the other hand, if you up the ladder, arrived in the Way of the Round city walls.
Me parece que si subis un piso, el segundo departamento al fondo.
I think if you go up a floor, the second apartment in the back.
Yo me subo, pero solo si os subís luego al carrusel conmigo.
I'll go on it, but only if you guys go on the carousel with me after.
Os subís al autobús.
Get on the bus.
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