Top Definition
a type of orgasm that originated from Norwegia/Norway.
legend has it that if a person's surname was Ulfson, he or she is an unstoppable sex machine.
girl: ohhh godd I think I'm about to cum....UUUuuuulllLLLLFFFFffffssssSSSSSSSssssooooOOOONNNNNnnnnn
Ulfsson: chyeahhh baby, now go clean yourself up
by CHHHRRRISSS LLLE September 26, 2011
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