A Phrase commonly used at inappropriate moments which generally lead to a self-annexing of any relative allies/friends/acquaintances around you, which they then consider you a hostile and proceed to end you.
Dude1: Shit man, i know that chicks got four muffin tops, but damn that's Fuckin' Mildly Attractive!
Dude2 proceeds to bludgeon Dude1 with a nearby object until his brain matter becomes soup.
On a Monday, after an already heavy weekend on the lash, having assured yourselves that tonight is an early night, you and your friends find yourselves pissed as a fart at 3am, when you whisper to the drunkard next to you, 'it's a fucking Monday'.
Time: 3am on a Monday Tom: Suz, wtf, it's a fucking Monday
Suz: yeeeeeeah it is