Top definition
the curse of kasin is one of the oldest and worst curses known to man. it is when you're about to fuck a girl but she claims to have her "period". when you ask for head she "doesn't do that".
josh: yo i brought this bitch back home from the bar last night

joe: oh yea what happened?

josh: the curse of kasin struck again!!!
by Johnny Tsunaamii October 31, 2011
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