Long running, eh? Duracells or Energizers? 
Honk if you’ve been in Mariana’s Trench, once, in 1960, for only 20 minutes.
Not to pimp my own horn, but I’ve been selling the Cite!? sticker for a couple years. To be fair to other boards, it’s not just a purely SDMB sticker.
I came up with one, but it’s not very good. I’m still thinking.
Honk if you have an Uncle Cecil
I Love luci
What Would Jesus Post?
YMMV!
Doper on Board
My child is on the SDSAB!
I see you and ROFL.
IMHO you’re too close if you can read this.
Warning, Thread Detour Ahead.
I Brake for Forum Changes
You don’t know me, but I’m in GQ every month.
I Pit the Highway Patrol!
My bumper sticker is my cite
Seriously, we should just pick one (my preference, FWIW, is “Og Smash!”), and moving beyond bumper stickers, try to introduce it into the English language, virally. Use it liberally and everywhere. Dopers on every continent doing this might just make it work. It would go beyond the satisfaction of “I’m part of an exclusive club” (which is fine) to “I was part of something which changed the language permanently” (which is more satisfying). Go viral!
Hmmm, not a bad idea. I had just been thinking a way to confuse the crap out of non-dopers and identify yourself to other dopers. But being part of a new phrase…intriguing.
I saw a Bush/Cheney2000 sticker yesterday. Maybe we could make a Bush/Cheney: Are you happy now, chump? bumper sticker.