Formal:
* Shirk: This implies deliberately avoiding work and responsibility.
* Malinger: This specifically refers to feigning illness to avoid work.
* Procrastinate: This is a more general term for delaying tasks, but can sometimes be used to describe avoiding work by making up excuses.
Informal:
* Goldbrick: This is a slang term for someone who avoids work or duty.
* Fudge: This implies using excuses or tricks to avoid work.
* Cut corners: This means doing the minimum amount of work necessary.
* Skive: This is a British slang term for avoiding work.
* Slack off: This is a general term for becoming less productive.
The best word to use depends on the specific context and the tone you want to convey.