What does panson mean in Spanish?

Translate “panzón” to English: paunchy person, big-bellied person, fat-bellied person, fatso, pot-bellied person, lardass.

How vulgar is Pinche?

Pinche. Another crucial piece of slang you should try to pick up is pinche. The translation for this isn’t super fixed, but its most commonly used as a substitute for ‘fucking’, when referring to a person or situation.