slang; meaning wack or extremely strange, originating on a low rent island in Maine. For some thing to be bunk it must make you want to cry laugh hysterically or most commonly; run for you life.
her attitude towards the job was completely bunk as she didn't perform any of the tasks assigned to her and made the lives of her co-workers miserable with her naggingnegativity.
In Rhode Island, to "bunk" is to take the day off from school. Most days before extended breaks are referenced as "national bunk days", despite "bunk" being local vernacular.
Vinny: We have next week off, you know what that means!
Tony: Friday's national bunk day!