A colloquialism developed from the word "criminal", describing a behaviour, style or situation which is considered mischievous and/or cool.
"That's Stacey, she's real krim!"
"Let's get the Krimlers together, its time to get a bit krim!"
"You're looking really krim tonight."
"I'm just gonna be krim in my gown all day."
"This is probably looking pretty krim, but I ain't stopping now!"