Snowplow Official Definition-
While giving Head the woman refuses to swallow cum shot. Rather she takes it on the tongue and lets it cascade down her lips and chin with pleasure yet wothout allowing any down her throat.
A sexual act where a supportive partner kneels behind a person equipt with a penis, rolling them into the yoga position called the "plow". Followed by, the supportive friend lending a helping hand with a reach around (or for added fun, go between the legs, and drive that stick shift) until it snows on the plows windshield. Bonus points for sticking out the tounge to simulate catching falling snowflakes.
"She enjoyed getting him as hard as a rock, then finished him off with a quick snowplow. After getting splattered across his face, he joked that they must have already salted the roads."
A snowplow bomber is an inexperienced skier who simply skis straight down the hill in the 'snowplow' or 'pizza slice' position, which is putting your skitips together in a point to slow down.
Mark: "Did you see that snowplow bomber?"
Joanne: "Yeah, he was just sliding down the hill, I had to swerve to avoid him!"