Top Definition
The process of a girl being on her period, not cleaning herself until the blood and discharge dries and crusts over, followed by a creampie and a vaginal feltching.
"Dude that party was sick! I heard that one guy was soo trashed, he gave a girl a Crusty-Rusty and didnt even know it!!"
by Jared M., Steven S. November 16, 2010

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
Catch-all word for an affliction or disease that isn't known but surmised.
"I don't want to go anywhere near that guy- I think he has crusty rusty's or something"
by The Maze June 25, 2008

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug