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An exclamation and insult rolled into one.

When used as an exclamation, it's similar in meaning to 'Son of a Bitch'

When used as an insult, it implies that you are the offspring of ten year olds fucking.

Spoken very fast, shortening of 'Son of a Small Children'.
Exclamation-Sonnuvasmallchildren, dude! Those tits are HUGE.

Insult- You're a real cocksucking monkey fucking sonnuvasmallchildren, you know that?
by Arr0w November 13, 2010
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