It is a euphemism for a transsexuals penis.

Sometimes used for crossdressers, transvestites and/or drag queens.
I was about to have sex with this chick, until I noticed she was packing some she beef.
by WillowQueen December 3, 2010
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She’s Beef is a phrase that can be used to describe any inanimate object. The term originated from the Scottish slang She’s Beefy and is predominantly used in and around the Carnwath area.
Friend 1: Look at the size of that water bottle!

Friend 2: She’s Beef
by Mr Pillows February 27, 2021
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