Flop stab multiway

The SB is spazzy and aggressive - only 24 hands so far, but is running 38/33 with a 12.5% 3bet.

The button I don't really know for sure yet, but seems very fishy, and his sizing on the button looks fishy too.

I think 4betting pre is arguable, but on the other hand it probably takes a lot of the air out of the agrotards range, so I called to let him bluff at it postflop, then the buttons overcall seems to have shut him down.

Do you like a stab here with the button still to act, if not, what's your plan?

Also, if the agrotard checkraises such a dry flop after this preflop action (in these positions) do you like just jamming it in with the overcards?

Poker Stars, $0.05/$0.10 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

BTN: $18.67 (186.7 bb)
SB: $10.45 (104.5 bb)
Hero (BB): $21.80 (218 bb)
UTG: $10.93 (109.3 bb)
MP: $8.98 (89.8 bb)
CO: $10.65 (106.5 bb)

Preflop: Hero is BB with A Q
3 folds, BTN raises to $0.30, SB raises to $0.90, Hero calls $0.80, BTN calls $0.60

Flop: ($2.70) 9 3 3 (3 players)
SB checks, Hero bets $1.90