Pouring coffee into my jinxed mug or sitting down to eat. For the longest time I was called "**** Magent", they even had a name badge made up for me with that on it. For my boss its washing the rig or taking off her boots. So when we work together, I don't use that mug, she keeps her boots and I we wait until the very end of our shift to wash the rigs.
And we NEVER say the Q word.