The most definitive source on the program is the official UROP website. But in short:
“The Undergraduate Research Opportunities Program at MIT (UROP) gives undergraduate students the opportunity to collaborate on and contribute to real research across MIT. It’s a unique, hands-on way to pursue your passions, find new interests, or explore different majors.”
A UROP is unlike any other experience at MIT. Even if you are not interested in pursuing research professionally, you should consider doing a UROP for at least one term (semester or summer) in your undergraduate career.
Colloquially, the word “UROP” is used as a verb, a noun, or a reference to a person. For example:
There are many reasons why we’d recommend pursuing a UROP. Some of which are the following: