一身痞味
[yī shēn pĭ wèi]
It means 'covered in ruffian taste/air'. Ruffian refers to a hooligan, someone tough, rebellious or mischievous in an unscrupulous way. So it shows the user's boldness or even defiance in character. It is likely a nickname to describe his/her personality, appearance, or attitude, showing off a free and easy, slightly naughty lifestyle, without being restrained too much by social norms and rules.