A fuckin' weasel. You know the kind. That prick that always ends up ruining your day. That dude that steals your chick. In short, a complete asshole, one that shits all over everything he/she comes near - (team america reference right there). This person is an operator, they appear indecisive and cool at first, however they usually have a behind the scenes motive to fuck your life up.
Brock is such a weasel fuck, he screwed my girl then told my boss I'm a crack addict!!
'Watchtowering' or 'to watchtower'.
To have a habit of sitting in deep thought, or perhaps in between conversation topics, and starting to hum and/or tap the very memorable and recognisable introduction to Jimi Hendrix's version of All Along The Watchtower (originally written and performed by Bob Dylan)
Example: Steve is sat at the barbored; he's watchtowering again... ("Dum dum dum dum dum dum, TSSSSK, Dum dum dum dum dum dum)