(1) An exclamation implying success, teamwork, excitement or just plain over-energy. (2) A person with such gratuitous amounts of energy or "part-of-the-team"ness.
"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.
"Valar Dohaeris" is the third season premiere of the HBO fantasy television series Game of Thrones. Valar dohaeris means "all men must serve" in High Valyrian. It is the traditional response to the greeting, "Valar Morghulis."
Tim: Hello, I work with com-puters, dooh.
Tim's assistant: His name is Tim goes dooh.
Tim: My friend, Dawh Guy, goes "dawh."
Dawh Guy: Dawh-awh-awh Dawh-awh-awh Dawh-awh, Dawh-awh-awh Dawh-awh-awh Dawh-awh.
Tim: Goes dooh. Goes dooh.