Rusty Snowman 

The act of ejaculating on your computer screen when masturbating. Can be performed intentionally or most times, accidentally. Can result when you don't take care to masturbate at least two inches away from your computer screen.

I performed a rusty snowman and had to take my laptop to Best Buy, but they couldn't fix it.

Rusty Snowman by shmonroe August 24, 2016

Rusty Snowman 

The act of ejaculating into your partner's anus during sex when they have not properly cleaned their ass and the ejaculate rolls out, picking up dingle berries and traces of poop.

"Ah man... I was fucking her from behind and when I came it made a Rusty Snowman"

Rusty Snowman by Greg74 July 12, 2019