When you laugh to much that you have to breath but you can't stop, so you start "silence-laughter". Usually people suffering Spattish turn red and fall in the floor.
Clara had an spattish after eating a cupcake. Then we discoveredthat the sugar fo the icing was someting different.
Meaning a girl who is acting like a total whore.
Flaunting her body and trying to get all the boys.
Comes from the word "Sket". Loop
" Shanay, i don't know why your acting so skettish, keep your legs closed"
"That bitch Keisha over there is acting like a fucking whore, skettish cunt"