ninja snow 

noun: Frozen rain that sneaks up on you unexpectedly and beats the crap out of you only to leave quickly, without a trace. Also see: hail

The ninja snow totaled my car today! My Miata looks like a golf ball!

I was walking through the park yesterday when I got attacked by ninja snow. As soon as I got to shelter it was gone. Turned out to be a sunny day after that. Weird...

ninja snow by grisslebone April 25, 2011

Ninja snowball 

When you collect your fart in your cupped hand and throw it like a snowball in the general direction of anybody unexpecting it.

Rob's spaghetti O's looked kind of bland so when he turned his head I spiced them up with a ninja snowball.

Ninja snowball by Stinky Brownthumb July 15, 2018

Snow ninjas

When skiing and or snowboarding, and you take a header it was because of snow ninjas not youre personal inability to stay on your feet. Snow Ninjas are invisble and very fast and will put you on your ass especially if youve been drankin.

I got ol time hackyed by those snow ninjas.

Snow ninjas by kem two April 25, 2006