BB is 28/14/60% ~ 29 hands

Have only seen him SD 2 hands so far. Once he checked A7s in BB vs. SB open limping in front. Hand was checked down and he won with Ace high. The other was over-limping 76o SB after BTN open limped, hand was also checked down 3-way and he didn't bet once though he did hit 4th pair on the turn.

Anyway,

Poker Stars $0.10/$0.25 No Limit Hold'em - 6 players
The Official 2+2 Hand Converter Powered By DeucesCracked.com

BTN: $25.54
SB: $11.04
BB: $28.40
Hero (UTG): $28.33
MP: $29.46
CO: $25.00

Pre Flop: ($0.35) Hero is UTG with A A
Hero raises to $0.75, MP calls $0.75, 1 fold, BTN calls $0.75, 1 fold, BB calls $0.50

I didn't expect this many callers. This is actually the first time a pot is 4-way postflop since I sat down and this is not a typical situation. If it was I would have been raising bigger by now.

Flop: ($3.10) Q 7 7 (4 players)
BB checks, Hero bets $2.25, MP folds, BTN folds, BB raises to $6, Hero calls $3.75

Turn: ($15.10) 5 (2 players)
BB checks, Hero checks

River: ($15.10) 9 (2 players)
BB bets $12.25, Hero?

This a fold or a call?

Should I have bet the turn?

Sould I have folded the flop?

That would be a weird way to play trips/a flopped boat.
Don't fold flop, his line is FOS and he's repping nothing that beats us; turn check is fine but we're doing it to induce another river bet bluff which he did so snap it off.

EZ, call. Villain's repping house only IMO. tbh his bet size on the river does bother me, I think he's prob bet smaller with a queen. Still given his line i'm not ever folding overpairs here.

Hard to say.

BB has quite a big calling range thx to mw.
I've seen clowns doing this crap with a 7. Cause they hope they 'show weakness' on the turn by checking and hoping hero will bet it.

As you say he's not been on the aggro side of things i think you're beat here quite often.