Reference to Afro-Samurai, the popular Anime starring Samuel L. Jackson (voice) as the title character.
In a futuristic yet feudal Japan, it is said that the one who wields the Number 1 headband is the fiercest fighter in the world and shall possess godlike powers. The only way to obtain the Number 1 headband is to challenge and defeat him in combat. However, only the Number 2 can challenge the Number 1, while anyone can challenge the Number 2, which causes a constant struggle for the Number 2 headband.
This is used when it seems like EVERYONE has a bone to pick with you in a given day
dude, my girlfriends pissed at me, my roommate's on my case, my co-workers left me with a pile of work and my boss says im on thin ice -- I must be wearing the number 2 headband