Villain is: 49/0/x after I guess 50 hands.

What do you think of the first turn raise? What should I do now?

Party Poker No-Limit Hold'em, $ BB (10 handed) from (Format: Bet The Pot)

stacks
MP3 ($3.33)
Hero ($23.30)
SB ($30.14)
BB ($33.65)

Preflop: Hero is Button with , . SB posts a blind of $0.10.
5 folds, MP3 calls $0.25, 1 fold, Hero calls $0.25, SB (poster) completes, BB checks.

Flop: ($1) , , (4 players)
SB checks, BB checks, MP3 checks, Hero checks.

Turn: ($1) (4 players)
SB bets $0.25, BB folds, MP3 folds, Hero raises to $1.25, SB raises to $6.25, hero?

it looks to me like he has trip 8's and he doesn't want you drawing on the flush with naked [Ac[

You should probably bet the flop here, $1 will take down the pot a lot of the time, that is why you have the dealar button and best position, so you can bluff and semi-bluff at pots where nobody has down any interest, sure from time to time you will get check raised.... but this is still a classic semi bluff situation