This phrase is usually used as "You can stuff your sorries in a sack, mister!", meaning that however much a person apologizes, their apology will not be accepted. Made popular by George in the Seinfeld "India" episode.
Dale walks in closes door. seoul- whoa man! I didnt buzz you in! how the monkey did you get in here? Dale- oh im sorry man some guy let me in with a fo-hawk and- seoul- kyle man? ugh what the fuck is the buzzer for anyway man! Dale- im sorry man.
Seoul- oh, stuff your sorries for the sack, take a seat.