Sounds like "son of a bitch". Used to avoid swearing by high schoolers. May have first been attested in the 1962 film, "Mr. Hobbs Takes a Vacation" starring James Stewart.
Mr Hobbs: "Let's go get some sun on the beach!"

(Some time later, his foreign maid quits because she can't tolerate his "swearing")
by old movie man June 9, 2011
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a slightly altered way of speaking 'son of the bitch'. Or probably just a scene involving the sun and the beach.
Mate 1: woah, look at that! sun of the beach! a pretty scene!
Mate 2: nah it ain't, you sun of the beach.
by Barnacl437 November 2, 2023
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