It means “pull out some fuckin beans” in Spanish. When saying this, you’re not asking for your friend to pull out, your demanding that (he/she) toots it out so you can do some destruction in their asshole and create a mud slide.
Saca = pull out
Unos = some
Faucken = foreigner’s way of sayin “fuckin” in English which is universal
Frijoles = beans
David: Victor!! Saca unos faucken frijoles cabron!!!!
Victor: Come on David, don’t say that man…that’s fuckin nasty.