skive off

skive off {UK} (аvoid doing work or other duty; shirk) — отлынивать, увиливать от работы|| прогуливать; сачковать

Example 1: I pretended I was ill and skived off on Monday.

Example 2: I'm going to skive off and spend the day at the beach.

bunk off

Example:The Council will prosecute parents whose children bunk off school.

Related vocabulary:
[swing the lead]
[slack off]
"Skive" is British slang for avoiding work by staying away or leaving early; it's often heard in the form "skive off"; US readers may find it in British works such as the more recent Harry Potter books. It seems to have been military slang from the time of the First World War and the common assumption is that the British army in France borrowed it from French "esquiver", to slink away. The usual caveats apply, since that origin is informed guesswork.

The reason why the purported origin is interesting is that there's another meaning of "skive", to split or cut a material such as leather into slices or strips, or to shave or pare a material to reduce its thickness. The word isn't that old (only recorded from the 1820s) but almost certainly goes back to Old Norse. (worldwidewords)