Learn English – Is “teh” an English word

It is very common to read "be upset" as be meaning "to be bothered" [about something or with someone].

John was upset about the news that his dog was missing.

I hear it used to mean "to be angry" sometimes:

John is upset with you because he thinks you let his dog out.

However, being upset with someone is a very mild form of anger. If John were really annoyed the terms "angry" or "pissed off" would be used. Moreover, I would not consider this to be a translation of 慌てた (awateta) or, in present tense, 慌てる (awateru), which I think would be better construed as meaning to be confused or disconcerted about something. 慌てふためく (awatafutameku) seems a better candidate for "flustered" or "panicked" — that kind of upset.

Moreover, you can be upset about things that you didn't just learn about. You can be upset about things that happen over time.

Marvin has been upset ever since he started that new diet.

Upset comes from the term meaning "knocked over":

In reaching for a fork, Joe upset his champagne glass and spilled its contents all over the table.

SF's conjecture, fraternity, appears to be correct. I couldn't find the audio, but what I take to be either the transcript or the original from which the read story was adapted is here. Below is the portion corresponding to your transcript, with departures bolded and unincluded matter italicized:

Instead, airlines—particularly Delta—and charter companies cater to teams with tricked-out jets, handpicked flight attendants and meals from players' favorite restaurants, sometimes served on silver trays.

Team charters often used to amount to a fraternity party of beer, pizza and junk food, sometimes with guitar playing and rookie hazing, but airlines say the days of raucous party flights are gone. Many teams ban alcohol, have nutritionists select menus and set up plane interiors so coaches can study game films and players can sleep.

I conjecture that what you heard as “Sanchez” was probably “such as”.

For those whose cultural awareness does not extend to the ‘frat party’: this is a convivial assembly hosted by a 'fraternity', a university-based social club of sub-adult US males, and characterized principally by participants’ indulgence of their libidinal and appetitive impulses with as little restraint as circumstances permit.