[FroggyTheGremlim]

I see it often hete, what does BTTT mean?

[bankwalker]

BTTT = bump to the top

[El Cid]

what does BTTT mean?

In the old days, maybe 15+ years ago, when someone made a reply, that particular post would go to the top of the lists of posts.
Thus, BTTT stands for ‘Bump To The Top’.
Since the posts are no longer ‘bumped to the top’, BTTT has lost its relevance.
I suppose it mostly stands for ‘I approve of this message’. Or some such…