A name for a female that is in a bad mood, mostly due to lack of sleep, extreme amounts of drama, waking up late, or an overload of extracurricular activities. You can identify a "Deezi" by applying it to one of the following characteristics:
Hair is in a wreck
Black jump suit
Sandals (any time of the year)
Disgusting look on her face
Excessive amounts of sighing.
Guy 1: Don't talk to Katherine today, she's being a bit of a deezi.
Guy 2: Must be that time of the month eh?
Guy 1: Yeah, I don't trust anything that bleeds for 5 days and doesn't die.