pethy
Anything that tastes like it has a gritty, rough grainy or sand-like feeling, inside your mouth when you're eating, & you have to spit it out right away.
Jimmy spit out his lima beans after eating them because they had a gross, pethy feeling when he chewed them up.
pethis
Short for either of the ( ) punctuation marks that together make a set of parentheses. Generally used in coding.
You forgot to close your pethis.
for, open pethis, var i = 0; i < array.length; i++; close pethis
for, open pethis, var i = 0; i < array.length; i++; close pethis