Please...?

I'm not so sure about it. It looks like weak A... but it also looks like wiffed flush draw...

Villain just sat down, I have 8 hands on him. From those he's 40/0, but that means precisely dick. I overbet preflop, so this leads me to think an A is certainly possible. AK?

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

BB ($29.40)
UTG ($11.55)
MP ($32.95)
Button ($43.05)
Hero ($20.55)

Preflop: Hero is SB with Q, Q.
UTG calls $0.25, 2 folds, Hero raises to $1.75, BB calls $1.50, UTG folds.

Flop: ($3.75) 6, 9, A (2 players)
Hero bets $2.75, BB calls $2.75.

Turn: ($9.25) A (2 players)
Hero bets $4.5, BB calls $4.50.

River: ($18.25) 4 (2 players)
Hero checks, BB bets $11, Hero folds.

Final Pot: $29.25