Using people up to all their resources and taking credit of all that was done is also associated with this term. Simply put its using people and then acting like that one hasn't but still remain to use people for self gratification.
Act of getting used and/or screwed.
Act of fucking one over.
"Damn, the cops beasled me this evening."
"I beasled my female partner last night and didn't return the act, and passed out right afterwards."