A caring, playful, loving, hard working, no-nonsense kind of woman. She will give the shirt off her back to someone in need but she doesn't suffer fools. Children gravitate towards her because they sense the child still alive within her. She is who she is and makes no apologies for it.
Specifically applies when the guy who got 'sirred' hasn't accepted that he's getting old and doesn't think there's enough of an age difference to warrant it. Doesn't count during retail transactions or any circumstance where the younger person is working and trying to sound professional.
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.