A fart which is light blue in coloration, It usually feels like a freezing cold breeze which can go as low as -60 degree Celsius (-75 degree Fahrenheit) in temperature or even lower, Making it possible for the one farting to freezing an object, Tongue, Other body parts Or A Full On Pokèmon/Person, Or alternately just be a cold icy/icecream-like chilliness.

(The Temperature Is From The Canon/Official Glaceon Wiki, So Take That With A Grand Of Salt)