Abreviations?

[mpsportster]

I'm new to the Barn and I keep seeing "BTT", "BTTT" and other abreviations. I have searched all over the site to try to figure out what they mean. I may be getting senile, but I don't have a clue.

 

[itslow]

"Back to top."
"Back to the top."

Used to move a thread back to the top of the topic listing.