sismick 

of or relating to the sign of devil

Guy 1:Yo dog look at that bamf sismick
Guy 2 : wtffff hes got 12 foot horns coming out his head

sismick by frisky moustace & vaccum belly January 1, 2007

sismacked 

a) Super-Dooper smacked
b) a way used to talk about being very high in public without drawing attention to it.

"Dude after i hit that bong i was sismacked for like 6 hours straight!"

sismacked by 420madness February 22, 2009

siesmick 

slang term for a sister or other friend

"Siesmick, where were you today? Momma didn't know where you went."

siesmick by Jamie "pisstang" Smitty December 16, 2003