by Felix Mole Rat January 31, 2022

Someone informing one who enforces a rule, code of conduct or law, law etc about another breaking any of the above.
by Lxver Bxy May 7, 2020

a man who doesn’t know what he wants, acts like a douchebag, leads girls on, and is an absolute player to his friends. aka a rat that belongs on the streets.
by sparklegirl08 May 29, 2025

A person from Fall River, Mass. Often described as a low-life, piece of trash who makes one's life a living hell to be around.
Colleen: "Man, I had to train this new kid at my other Dunkies. She was a real pain in the ass, couldn't do the simplest of tasks. A true River Rat.
Co-worker: "A River Rat?"
Colleen: "You know, someone from Fall River? They're all the same, never met one I like.
Co-worker: "A River Rat?"
Colleen: "You know, someone from Fall River? They're all the same, never met one I like.
by XxBenny22 March 27, 2023

Someone (ususally a woman) that frequently visits OHL or AHL hockey games with the sole purpose of getting picked up by a NHL prsoepct. Not to be confused with Puck Bunnies.
Me: "oh man did you hear about Stacey, she got pregnant from Ryan and he just got drafted in the NHL"
Friend: "She secured that bag! What a Rink Rat"
Friend: "She secured that bag! What a Rink Rat"
by Final Aura October 17, 2022
