A slang term that you use to call a person's long string of hair that noticeably protrudes out from the rest, usually due to the fact that the hair has been over-combed, unkempt and/or over-grown. Also can be spelled "Scheemer", to stress the proper pronunciation of the word. (Originated from the character "Schemer" from Shining Time Station.)
"Man John, you need a haircut. You have this gigantic schemer sticking out on the side of your head!"