The class ring of the Massachusetts Institute of Technology (MIT) in Cambridge, MA, USA. Of gold alloy, it bears a relief representation of the school's mascot, the beaver, chosen because it is an engineering animal.
I saw more than one brass rat at the Stanford Hillel. Evidently a lot of Jewish MIT graduates end up doing work at Stanford.
by Leslie Doppler May 23, 2010
Get the brass ratmug. .A way to refer to a closeted femboy. A man that wants to dress in a feminine manner, yet is scared to admit so
.Person A: My friend jerry is a sewer rat
.Person B: I wish him the best of luck with coming out to his loved ones
.Person B: I wish him the best of luck with coming out to his loved ones
by wemz May 23, 2021
Get the A Sewer Ratmug. 
A term for Washington congressional staffers on Capitol Hill. As often as not they are arrogant, and can be abrasive and abusive -- particularly when constituents show up with complaints about how they get screwed by stupid laws passed by their bosses.
by England phi beta gamma March 31, 2008
Get the hill ratmug. Collective name of several top entertainers who were known to pal around, and party, during the 1950s and 1960s. The recognized leader was singer/actor Frank Sinatra, and the group (Famous for its Vegas shows, done while filming Ocean's Eleven) consisted of other top talents, Dean Martin, Sammy Davis Jr., actor Peter Lawford, and Comedian Joey Bishop.
by Kwydjebo September 16, 2004
Get the Rat Packmug. A man with absolutely no standards when it comes to the opposite sex. When he is not looking for a random wet hole to put his dick in, he is busy plotting and scheming like a little weasel. Known to have a fetish for jank ass hoodrats.
by I Really Love Drilldos October 8, 2009
Get the Johnny Ratmug.