A word Sunmi (순미) uses in her song Gashina (가시나). No one knows what the fuck the word means, but, look on the bright side - everyone knows the dance to Gashina.
A breed of Northern English male occasionally spotted in the South. Appears to be a normal young man although in fact is really a drunken asphyxi-wanking beast who wears t-shirts that are a size too small. Beware of a gashkam on a night out.
Chris : "What the fuck was that gashkam up to last night?"
Eddie : "Some v sketch shit. After some beasting on the glockenspiel he was sick on the carpet and we had to leave."
The title of a song by Kpop idol Sunmi it is also used as a word in the song itself. There is a dance of which accompanies the song where gun fingers are used and you move your head from side to side.