Top Definition
one who is usually very outgoing that instantly becomes shy around someone they think is hot and/or have hooked up with in the past, a dead give away to past indiscretions. usually happens when one is with current boyfriend/girlfriend
1)"She became a total shy sheep when he walked in."

"Dude, that's because they hooked up last summer"

"FML we were going out then"

2) "Totally glad i didnt shy sheep it when she walked in, I would of got caught up."
by cgneeks93 March 21, 2011

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