When a female stimulates a male by rubbing his testicles or licking the side of his cock while he is laying down and his cock is erect and pointing straight up, the "snow cone" occurs when the cum oozes out and remains on top of the cock, ready to eat.
She blew me, squeezed me, licked me... and finally ate the snow cone.
A variation on a snowball. When the girl who just finished blowing you attempts to "refund your deposit" you punch her in the nose, causing her to spit it out and bleed all over it, dying it red. Hence the snowball becomes a snowcone!
That bitch I've been ballin' tried to snowball me last night so I gave her a snowcone.