There is a continuum between losing your shit, like normal people do, and having a full blown behavioural disorder that destroys your life. We all lie somewhere on it. There's probably another continuum that goes off in the other direction, with jesus hanging out on the end with master joshu or something.
If you need to put a label on yourself, intermittent explosive disorder or something is likely closer than bipolar.
http://en.wikipedia.org/wiki/Intermittent_explosive_disorder
There really is no reason to pathologize your behaviour unless you want to seek treatment though. There's a lot of shite in the DSM.