A shortened form of the formal 십시오 command. It keeps the deference toward the listener but sounds brisk and theatrical, which is why the lines here are mostly men addressing a senior, half in jest: rip him to shreds, sir; just let me do it; sleep well, hyung. Next to plain 십시오, which is the neutral formal register of announcements and service speech, this one sounds like a period drama or a loyal henchman.
Register: deferential but blunt and jokey; mostly male speech