Ncmsl
A shortened version of "Undincamisile", a Xhosa term to express shock. Undincamisile can also mean "you have kissed me, you kissed me, s/he kissed me", which is not related to the definition we are talking about here.
Girl 1: She has already moved on.
Girl 2: For real? It's only been 2 weeks.
Girl 1: Dead serious.
Girl 2: Ncmsl
K1
K1 is the slang term for the township Katlehong, Johannesburg in the Gauteng province of South Africa.
"I'm K1 'til they put my name on the tomb" - Kwesta on Mmino
Gqwirhy
Gqirhy or gqwirhi is an informal Xhosa term used to refer to jealous or black magic tendencies.
I bought this car last month and today someone stole it. Yhu ni gqwirhy kulendawo
Gun Dubula
A Gun Dubula is a person in Kasi who carries a gun and shoots people (trigger happy).
Do you remember that Gun Dubula who jumped the school fence and shot a rival gang member who was writing exams?