A word commonly used by elders who want to try and act "hip". Most teachers use this expression.
A more polite was to say Damn, or dammnit.
Many forms of this word exist.
Also associated with twit, twerp, dumb bunny.
Most people who use this word have actually no idea what "hip" words mean.
When asked what crunk was reply: "I am not sure, maybe you should look it up on the internet or something."
Teacher - "Crummit, I messed up!"
Student - "Crummit...WTF?"