Verb conjugation of "chupar" in Spanish

I ordered a cab at four o'clock in the morning which took me to the Central Bus Station. I was much to early because the bus would go just at seven o'clock. Anyway I was sitting there and listening to music.
These are the guys who need to be blames. They are primitive, ignorant, selfish and they appear to me as thought they are confined in their ideas. They cannot think outside the box for even once.
To be honest, we did not understand one word of what he was saying, because his English was so terrible. Or maybe it wasn't and it was only his accent which we could not grasp. To us it was Chinese.