Meaning of "Mamnuldem"
On Twitter, when striking up a conversation with a stranger, the act of clicking the heart icon or sending a DM (direct message) is often described as a "promise" or "signal."
"First, I sent a Mamnuldem to gauge the mood and then greeted them casually."
Related slang words
Coo-coo-cooA term used to mock or ridicule someone whose fashion or appearance is so obvious that it actually looks messy or tacky, poking fun at their behavior to elicit laughterOm mani padme humA Korean translation of a Sanskrit mantra from the Buddhist *Cheonsu-gyeong*; recently, it has been used as a meme (mantra) that people recite habitually—regardless of its meaning—to soothe feelings of emptiness or when they need to cultivate their mindHomeWatching or enjoying performances, sports, and other events from home (online)CoronacationDue to social distancing and business closures resulting from COVID-19, people have been effectively forced to take time off from school or work, finding themselves in a situation akin to a school breakArmyThis is the official name of BTS’s fan club, which stands for “Adorable Representative M.C. for Youth” and symbolizes the fans as a united and steadfast cheering squad.Waiting RoomOriginating from an internet meme, this phrase draws on the premise that "Gamst is waiting longingly for Rilka" and is used in romantic role-playing scenarios to tease a partner or lighten the mood playfully.SansjangA trend in which people are turning to public exercise equipment in mountainous areas to work out due to restrictions and regulations on indoor sports facilitiesSavageDerived from an English word meaning "savage and ferocious," this term is used in hip-hop and pop song titles or as a meme to exaggerate a rough, raw appeal (coolness and aggressiveness).