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1.
when a boyfriend is "talking" to a girl that isn't his girlfriend
girlfriend: "Oh my god! my boyfriend is cheating on me! look at the texts he sent to this other girl!"

friend: "wow, that bitch pulling a sheldon."
by boompowlala November 24, 2012
 
2.
When A boy ditches their good friends in order to get the attention of a girl, or completely ignores you just because he is talking to a girl. However this goes against thebros before hoes idea. The difference with pulling a Sheldon is that the girls either have no intention of getting withthe boy OR just don't care
We were going to go the the cinema but it as obvious he ws going to be pulling a sheldon when he was those girls, so we had to go without him
by Drakeria June 10, 2008