Someone or something that is annoying, frustrating or incredibly difficult to overcome.
The double use of 'Rat' is used to establish the utter annoyance with the subject of the conversation.
The double use of 'Rat' is used to establish the utter annoyance with the subject of the conversation.
by The Chicken Shed Possy June 5, 2005
Get the Rattin Rat'mug. 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 pigeon
by SALTYteaBAG June 16, 2009
Get the Rat with wingsmug. .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.