맘충 [mom choong]
Noun
1. a mom who does not teach her child manners and acts impolitely herself.
(1) 애들이 식당에서 뛰어다니는데 저 맘충은 지 친구랑 떠드느라 바쁘네.
(The kids are running around at a restaurant, but that mom is busy talking to her friend)
Roots
Mom + -충 (a suffix meaning an "insect.")
Origin
The term was first used widely after the 7th live show of "마이 리틀 텔레비전 (My Little Television)," which aired on July 12, 2015. It is a TV show where five teams of celebrities do whatever they are good at to entertain the audience on a live Internet show. One live Internet show is edited into two TV episodes, which air on national TV. Celebs can see messages that people type through a chat during a live show, and on the 7th live show, many moms demanded one of the celebs, Chef 백종원, that he shout out their children's names on the show (as if it were some kind of an honor). This annoyed the rest of the audience, and people started to use "맘충" to express their anger towards moms with no manners.
Popularity
The term is widely known among young people, but its usage is somewhat controversial since it is sometimes wrongfully used to describe normal moms. Make sure you use it only in appropriate situations.