Do a bunk
Definition 1 of 1
Pro Tip 1/3Informal Speech
Used in casual conversation, not in formal writing or speeches. 
After messing up the orders, the new waiter decided to do a bunk.
Pro Tip 2/3UK Usage
Mostly used in the UK, English speakers from other regions might not be familiar with it. 
She planned to do a bunk after her gig in London.
Pro Tip 3/3Negative Connotation
Implies avoidance of responsibility or escape from a tricky situation. 
The night before the exam, he did a bunk from his study group.