Dept of Familiar Obfuscation

[libertango]

I was just poking about on Flickr, and saw something it took me a moment to decipher:

"hbw"

Anyone want to take a shot at it?

(Hint: It's sometimes spelled out in captions, but only about 14% of the time.)

Comments

[bohemiancoast.livejournal.com]

Happy Bokeh Wednesday. But why, ah, that I have no idea. Easy to decipher by noting that nearly all the photos tagged hbw were bokeh. I'm in a group called chiyogami Monday, so perhaps it's a relative.

[aamusedinatx.livejournal.com]

Those simple 3 letters make my brain hurt, even with coffee!
Have black & white is the closest guess I can get to.

[intelligentrix.livejournal.com]

Height by width?
Bah.