I'm not sure where there is a place to be offended. TLU doesn't translate into anything coherent, so clearly it was a joke given its context in the discussion.
It really was a joke!
I was only posting this because I got to thinking about how everyone calls them JKUs for JK Unlimited, and then I thought it was interesting how the name TLU never caught on in the first place.
Just shameless thinking out loud.