means wow or omg (said with a stress on the "oh")
Example1
Laura: "have you seen her new insta post"
Ruth: "oh-she-en, that's bad!"

Example2
Lizzy: "oh-she-en, ben look at this"
Ben: "WHAT"
Lizzy: "i just got tickets for Courteeners"
Ben: "OH-SHE-EN"
by dickither February 17, 2018
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