I am not cool, so I will post my un-cool first mental responses to your list, Sparteye:
Ego wall...........a wall of mirrors used in a ballet or dance studio
Golden ghetto........a ghetto in San Francisco near the Golden Gate Bridge
Minds-on..........Awake?
Hillbilly heroin........Moonshine?
Wallet biopsy...........Paying with credit cards?
Metrosexual.......Hmmmm.....someone who picks up people for sexual favors on the Metro?
Anus envy.....Good grief! I don't even want to consider this one.
Bed blocker......Venereal disease
Bridezilla....Well, it must be the Bride of Godzilla
Big hair house.....beauty salon?
Bozo explosion.........A clown being shot out of a cannon at Barnum and Bailey
Trustafarian..........I have no idea, but I'll bet I'm one.
OK. That should prove that I am the uncoolest of everybody here on this board.
Square regards,
WW