To "doamikey" one must engage in spontaneous rage over something completely mondane that takes place in day-to-day life. To successfully pull it off one must build up slowly with short burst of childish screams finally reaching a climax of profanities and the occasional throw of a random object.
Geoff: That guy is struggling to open a tin of beans.
Harry: He looks like he is getting mad.
Angry Man: ARRGGHH
Geoff: He's gonna doamikey.
Harry: He gonna flip his lid.
Angry Man: *Slats beans across kitchen and hits bike*
Geoff: OH NO HE'S HIT HIS FAVOURITE RACING BIKE.
Angry Man: TWAT FUCKING SHIT.