Doing anything but that which you are supposed to be doing during a specific time frame.

E.G Pretending to do something for which you are being payed for, such as a your job, but instead doing other things (like having a laugh, phoning your friends, hiding from your boss, surfing the internet, playing computer games, having a sly cigarette) that are totally unrelated or unconected to that which is within your job description.

To avoid work but still appearing as though you are doing something.

v. (mainly Brit.) To go AWOL and present an obscure excuse upon return.

To be absent from work or school during the hours that you should normally be there for purposes that have nothing to do with your work or education activities. Used a lot in the construction industry.

to vomit, throw up etc.