A mytholgical creature that dwells in the deep cornors of the forest, but, a "cru" may enter into the real world on every second tuesday of every third month, or when gerbils and parakeets are on sale at petco.
1. "Stupid CRU"
2. a word to to call your friend that usually says dumb stuff.
3. something ugly. ex. "dude, thats so cru."