QUICK ANSWER
"More or less" is a phrase which is often translated as "más o menos", and "pretty much" is a phrase which is often translated as "casi". Learn more about the difference between "more or less" and "pretty much" below.
more or less(
mor
or
lehs
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (roughly)
pretty much(
prih
-
di
muhch
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. casi
Have you spent all your money already? - Pretty much.¿Ya te gastaste todo el dinero? - Casi.
b. más o menos
So Brad hasn't bothered calling you yet? - No, but that's pretty much what I expected.¿Así que Brad no se molestó en llamarte todavía? - No, pero es más o menos lo que me esperaba.
c. prácticamente
The show's pretty much sold out already.Las entradas para el espectáculo ya están prácticamente agotadas.