Albert Barnes Commentary 2 Samuel 16:7

"And thus said Shimei when he cursed, Begone, begone, thou man of blood, and base fellow:" — 2 Samuel 16:7 (ASV)

Come out - Rather, “Go out,” namely, from the land and into exile. .

You bloody man - The Lord’s word to David in 1 Chronicles 22:8 was probably known to Shimei, who now threw it in David’s face, with special reference to the innocent blood of Uriah.