staggy

pain in the ass.
person who craves attention.
someone who would do something intentionally to harm themselves, just for the attention.

crafty and tripped out behavior

To "do a staggy" is to cut your arms for attention, and, specifically, to cut your arms only to then roll up your sleeves and show it off. Thus, to demean those who hurt themselves and are then ashamed of it, to a point where they don't shove it in people's faces.

A staggy can also refer to an attention seeker in general, or a general pain in the backside.