When a basketball player blocks multiple shots throughout the game, resulting in almost a business of blocking shots. Hence, block shop.
Jeff: "Did you see Mike blocking shots left and right last night?"

Jordan: "Yeah, he had a block shop and it was open for business."
by JR Roberts December 13, 2009
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(v) Preventing someone from shopping.

(n) The person who prevents someone from shopping, or the act of preventing someone from shopping
I was supposed to go shopping with her, but she didn't show up until after the store closed. It was such a shop block.

I wanted to buy a scarf that she hated so she totally shop blocked me.
by Architect of Destruction November 20, 2010
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