chicken ventilator 

A staple in many chemistry labs, the chicken ventilator can also be called a hood. You do chemistry in there, and on rare occasions, you may also see a mustached man smoking a cigarette or ventilating chickens.

I was goin dahn the chem lab to ventilate some chickens when I found grundle tickler Frank smoking a cigarette in the chicken ventilator.

chicken ventilator by John Dubich April 25, 2007