Villain just sat down, so no reads.

This is key. Yes, it is spewy. You don't have any info on him.

I would have to say this is spewy, mainly the turn call of his check raise with 7 high. This call of his raise is only profitable if you know the river is gonna bring a card to kill his action. Assuming he is just a standard tag nl100 player he has to have at least A10 here which is very loose to play oop imo. The king that paired the board and brought the flush is the only thing that really saved ur spewy line here because as played it looks like you could very easily just have the flush draw here. However it really depends on if he believes you too and i really think he may have tanked-called here with like AJ or something..............then again if he was a lag player he could he been trying to bluff you off what ever you had with the check raise on the turn and give up the river but i think that he has a hand here more often than not with no reads making this line spewy

I thought villains c/r on turn was either 2 pair, trips or a flush draw, so if I do hit my straight im probably going to stack him a high precentage of the time. Imo most players will always bet a flush or a full house on river since im always going to check back AX-hands. If villain have a hand like aj, aq isnt quite spewy to call a shove against an unknown? 

This is spew

What are you repping with this bet? A boat is all really - would you really shove a flush on the river?  Would you 2 barrel a 2 overcard board with a non nut flush draw?

I think flop is fine and I think turn bet is okay too - but river is un-neccessary

Granted villain's turn C/R reps a really small range - i still dont think you ever show a profit here except by folding out air.

If thats your goal - you could bet 1/5th the pot and accomplish the same thing.

I think OhJoy is spot on here.  You have no reads and no history. 

Spewy because of my bet size or because im trying to bluff this river at all?

Im obv trying to rep either a flush or a boat. Im not trying to fold a boat or flush, just AX and air. I dont see the point of villains c/r on turn with a flush draw and not trying to get some value out of it on river...? same goes for a full house. So his line looks like A5, A4 or 54 that hit a disaster card on river. And my line certaintly doesnt look like 8 high....or?

With a flush i would probably bet small hoping to get some value from ax hands. with a full house (aa, k5, k4 or ak) it makes more sense to bet big and maybe shove...

I decided to overbet pot just to maximize FE. A 2/3 sized pot bet would probably do the job as well. And against an unknown its probably a bit out of line, but it was so tempting

EDIT:

I just re-read the hand, and i'm actually liking this more.

If you don't think villain checks any hand he plans on calling a river push with, and you think you can fold out just about 100% of his non-boat range - then i'm starting to like this.

I misread the board the first time, but you can actually rep a fairly wide range of monster hands by shoving this river, and villain can really only call you with a small portion of his range - and more importantly - i don't think he's checking that range to you on the river.

I think if villain calls you here with Ax-Flush any frequency higher than like 50% this is spew b/c you're not pushing him off enough of his range, but if he only calling with boats and high flushes - your push should show a profit.