A DWIT is a hapless person who's caught between being a dweeb and a twit. A total loser with no hope of ever changing. A DWIT is more of a put down than either of its words of origin.
A Dwiti is a friendly, caring and weird person. She can be really cute but very annoying at times. She is a fun and warm person when you get to know her but is shy and awkward at first. All in all she is very gentle, pretty and fun to be with.