A phrase that expresses extreme fatigue. The word "beat" (though it is used to describe tiredness) is often used to describe slutty women who have sex often and look like trash (see bro-ho's for more details) Hookers often fall into this category, which is why this phrase came to be.
"Man, I'm so tired. I'm beat like a hooker."
by Ronnie Carrier December 04, 2008