taking a shaw
Derived from the latin word sha, which means explosive diarrhea. The term differs from the phrase taking a shit because of the shear explosiveness of the action. The term is often used to get out of work for a week or more.
Man, I have been taking a shaw all freakin day. You can count on me not coming to work for at least the next 3 weeks. If you need me I will be watching Dexter.