I’ve heard various nicknames for firearms, such as “Combat Tuppleware” for the Glocks, and my own nickname for the Beretta 92 (after having various examples, all loaners, jam multiple times for me) is the “Damned Pasta Pistol”.
Tarant County Community College up around Dallas somewhere is called, according to a friend of mine who went there, “Harvard on the Highway” Similarly, the University of Texas at Arlington is colloquially known as “The University of Texas… Almost.”
Texas A&M University’s ROTC is set up as a Corps of Cadets (all the cadets live together, dine together, etc. and train extensively outside of class when they’re not studying). The cadets who aren’t in the Band are called CTs, short for “Corps Turds”, and cadets in the band (the entire marching band is made up of cadets at A&M) are called BQs (short for Band Queers). While the longform names are discouraged by the military officers in the ROTC program at A&M, the shorthand acronyms are used all the time.
Speaking of the cadets, the seniors wear really nice leather riding boots as part of their uniforms, and students who date these cadets (or who particularly want to) are refered to as “Boot Chasers”.
Female cadets in the Corps are called WAGs (short for Woman AGgies), though the name is now considered somewhat derrogatory, it was apparantly started by the first generations of female cadets at A&M, as a means of pre-empting “Maggies” from being tagged onto them.
Silver Wings, a Public Service and Professional Self Development student organization, was originally known as “Angel Flight”, and consisted mostly of girls dating Air Force ROTC cadets. Because of these roots, the organization is sometimes refered to as “The Future Air Force Wives’ Club” (And while they get riled up when someone calls them that, an awful lot of them DO seem to marry newly-minted Air Force lieutenants, probably due to the long-standing cooperation between Silver Wings and the Arnold Air Society, the Air Force ROTC public service organization).