Comes from catercorner
Pronunciation: 'ka-tE-"kor-n&r, 'ka-t&-, 'ki-tE-
Definition: diagonally across from. Because of the way catercorner is prounounced it was sometimes spelled, cattycorner, and later kittycorner. People of poor breeding might say catacorner.
Function: adverb or adjective
Etymology: obsolete cater four + corner