Top Definition
When a male proceeds to ejaculate on a women's anus and the cum rolls down towards the genitalia. The cum resembles a Russian hamster racing.
"BRO GUESS WHAT!?"

"What?"

"Last night my Russian Hamster raced to her Vag in 6 seconds!!!!"

"No way, NICE!"
by GiggleGoat December 17, 2009
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