If my read is correct that's 90% QQ or TQ (latter much less likely), 5% another T8, 3% a hand worse than me value betting, 2% a stone bluff. In particular this would be a common recreational player's line with a near-nut hand: Either slowplay or miss a check raise on the flop; fill up and slowplay because he feels good about not getting outdrawn on the turn; lead for 60% pot OOP on the river because he's now worried about missing value.

But my read is speculative. What if I'm somewhat wrong? There's a bit more chance he could be value betting worse or the same (strange line with T4, backed into a hand with 88, bet another T8 for value) and occasionally just fire a random bluff after missing something
What if I'm very wrong? He should perceive my turn bet as a stab against which he can occasionally reverse-float, hoping to bluff me off many pair (technically two pair) and trips hands. Note my turn play is intentionally unbalanced; I actually think a reverse float here would be great against my turn range. Very few non-maniac live $1-2 players are playing this line here, especially with three who checked still behind.

I'm getting about 8:3 = 2.67 to 1; break even equity is 27%. I called but now I think it's a moderately clear fold.

QQ, duh. If it hadn't been, would I post this hand?

Well, actually I hope I would have. I would be interested in hearing of examples of calls like this where it wasn't the nuts; or of parameters we could tweak besides the obvious "BB is an unpredictable maniac" to make a call correct here.