XP
/ˌɛks ˈpiː/ · Abbreviation · Hacker Culture
Definitions
Short for Extreme Programming, the agile methodology emphasizing short feedback loops, pair programming, testing, simplicity, and continuous integration. The abbreviation is widely used by people already familiar with software process literature.
In plain English: A short name for the software method Extreme Programming.
Example: "The team never called it XP explicitly, but the pairing and test-first habits clearly came from that tradition."