A common greeting in UK English having a similar meaning to 'How are You'
"Hi Dave, not seen you for a while, how's tricks?"
"Not too bad, thanks. I've been staying with a mate from out of town. How's tricks with you?"
A cold like virus, for which women serve as carriers, which when passed on to men evolves into a debilitating illness which may result in death (probably).
Sorry, I can't help you wash the dishes, I caught your cold and now it has turned into hebola