A parent who is also a volunteer coach for youth athletics. Taken from the combination of Dad and Coach, but the meaning has become applicable to any parent coach combination.
I reached out to my daughter's doach to talk about his behavior at our game today.
"Doahae" (도아해) is a recently coined term by a member South Korean boy group SEVENTEEN. Dokyeom (도겸) created this term as a contender to his bandmate's term, Horanghae. It is a combination of the first syllable of Dokyeom's name, "도"/"Do", and "좋아해"/"Joahae", which means "I like you" in Korean. Although it's literal meaning is "I Do you", it is usually used in the place of saying that one likes something. It has been used by Dokyeom on his various Weverse posts and moments.
Dachla is an alternative word for penis. However, one benefit of the word "dachla" is that it is uncommon, and therefore safer to use around family and friends. Furthermore, dachla may be used to refer to someone's group of friends in a humorous manner.
Person 1: Hey, wanna party with dachla tonight?
Person 2: Ayoo, that's sus my guy!
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).