In my dialect, which is some sort of American English, trying to snow someone means trying to BS or con them. Blindsiding someone means taking them unawares -

In my dialect, which is some sort of American English, trying to snow someone means trying to BS or con them. Blindsiding someone means taking them unawares - hitting them when they aren't looking, physically or metaphorically. A speedball has cocaine in it, which is sometimes known as snow. "Iced" can mean killed, but the Urban Dictionary definition is oddly specific I agree about "snowballing" meaning increasing in size or momentum, but it doesn't have to refer to a problem.