Season 5 · Episode 3
The Simpsons
Homer takes Nuclear Physics 101 at the local college, where he gets a trio of nerdy tutors expelled for extracurricular activities.

In standard usage 'tonto' means 'stupid', but in this episode it is used consistently as a social category label for studious, socially awkward students, closer to 'nerd' or 'dork' in English. The shift from 'stupid' to 'nerd' is non-obvious and context-dependent.
Literally 'athlete' or 'sporty person', but used here with the cultural connotation of the English 'jock': a popular, athletically-oriented student who sees himself as socially superior to studious types. The social hierarchy implied is not carried by the dictionary meaning.
While 'pathetic' exists in English as a near-cognate, in Latin American Spanish 'patético' is used more sharply as a put-down, expressing contempt or mockery. The emotional charge is stronger than the English cognate suggests.
'Golpiza' is a Latin American Spanish word for a beating or thrashing. The phrase 'dar la golpiza de su vida' means to give someone the worst beating of their life, used hyperbolically in informal or humorous contexts.
Describes something or someone extravagantly odd, bizarre, or eccentric in a theatrical way. Not transparent from its parts; learners often misread it as negative only, but it can carry affectionate amusement.