There are many variations for the word twitchles. (1) If a person calls you this, they simply are too lazy to call you by your real name; (2) Being a twitch is another way of saying "Gay" or "Homo" or "pole greaser" etc, (3) Twatchina is simply the feminem version of twitchles, but since most gays are feminem, we save it for the fag hags a.k.a. back bone to the gay community; (4) It can also be converted to "Twitchy" and is often used as an adjective describing one's fabulosity.
(1) fag: Hey ...umm twitchles
fag hag: hey gorgeous
(2) fag hag: check out that twitch!
fag: mmm fuck me sideways!!
(3) fag: hey twatchina
fag hag: hey twitchles, wanna get some dick?
(4) fag hag: omg he is sooooo twitchy
fag: isnt he? absolutely yums