Ajumma (Korean: 아줌마), sometimes spelled ajoomma, is a respectful Korean word for a married, or marriage aged woman. Although it is sometimes translated "aunt", it does not actually refer to a family relationship. It is most often used to refer to any middle-aged or older woman since referring to an elder by name without a title in Korea is not socially acceptable.   The Lonely Planet guide to Seoul describes ajumma as a term of respect, but it can be used in a mildly pejorative sense as well.

Used in its pejorative sense, ajumma has connotations of pushiness, with ajumma described as hard-working and aggressive people who "push and shove their way through a crowd to find a seat in the bus or subway", "grab you by the arm and try to get you to eat at their place", or "push" friends and relatives to buy insurance.

When used in its pejorative sense ajumma can also have connotations of unfashionableness, with ajumma stereotypically described as wearing baggy pants, mismatched clothing and little makeup, being "pudgy", having unfashionably short hair in an "ajumma perm". 

Yup, That about sums me up...