I never realized that 'dogging' something meant one was deliberately underperforming. I'll look it up tomorrow, but now it's late again.

It would be pretty interesting if dogging something really meant what you all are saying it means because hounding someone means quite the opposite: going after someone or something with dogged determination. Very, very interesting. Dog can mean both going at something with determination and going at something with no determination. I just love these linguistic idiosyncrasies.