When someone who works in professional services (lawyers,doctors, accountants.. etc) is over studious and over achieving and makes others look worse and thus makes them work harder.
Typically seen in public accounting.
Typically seen in public accounting.
SG (tax accountant): hey Bro, you here JM asked for more work from the managers & partners. He said he still had capacity working only 60 hour weeks. Wants to up to 80.
DB (Other accountant): Man, that guy always tries to make us look bad we we only work the designated 37.5 hours a week. He’s such a fucking Nerd-Rat. *bangs fist on table*
SG: yea but your also a fucking nerdrat working 42 hours a week.
DB: Your a fucking nerdrat
SG: fuck you. Nerdrat
DB (Other accountant): Man, that guy always tries to make us look bad we we only work the designated 37.5 hours a week. He’s such a fucking Nerd-Rat. *bangs fist on table*
SG: yea but your also a fucking nerdrat working 42 hours a week.
DB: Your a fucking nerdrat
SG: fuck you. Nerdrat
by NOTACPA May 21, 2020
Get the Nerd-Ratmug. Rat king is an relly Nice guy he cares about people and stuff he gives you an honest opinion about things when you ask him and he is hella funny ISTG /pos
by Mars? April 5, 2022
Get the Rat kingmug. 
The term "hood rat" has been long used to discribe loose women and men from around urban areas. Basically just switch Urban to any bar where beards, tats, and IPA is on tap.
by Xmartyxmcflyx May 21, 2015
Get the Hip Ratmug. 
A rat is a person who lies and messes around while they're dating you. If you're dating a rat, you might as well just date Jeffery Dahmer.
by elizaaaaaaaaaaaaa January 27, 2023
Get the Ratmug. by Cassidyiam October 5, 2020
Get the Rat poop eatermug.