New game formed, we've only been playing for 30 minutes or so.
V1 is seemingly an OMC. Looks to be in his 60's, hasn't played a hand since we sat down. $440 behind.
V2 is very spewy, has played almost every hand so far. $250 behind.
Hero appears very young, short spiked hair, and a black jacket. Probably looks like a maniac. (Hopefully)
$575 behind.
Hero probably hasn't developed an image yet, but won one pot and hasn't gone to showdown.

Pre-Flop:
Folds around to V2 in the HJ who makes it $20.
Hero on the button calls with Q♣ J♣
V1 Calls in the big blind

Flop: ($62) K♣ 4♣ 3♦
Checks to V2
V2 bets $30
Hero calls $30
V1 calls $30

Turn: ($152) K♣ 4♣ 3♦ T♣
V1 leads $150
V2 is all-in for $200
Hero??

Obviously we're getting it in here almost always. But it spawns the question..
My line of thinking was that it all boils down to what V1's donk leads mean. USUALLY in my experience, it means the nuts. QJKT clubs are all gone, so is V1 really donk leading pot with the 9 high flush here? Are we possibly beat given V's description?
Adapting to donk leads is a leak in my game. They confuse me, and make me uncomfortable. Often times I don't know what they mean, or how to interpret them.

What do donk leads usually mean in your games?

You meant the turn bet from V1? Why would he lead so big with the nuts? However, he is an OMC, so maybe he is afraid of the board's pairing? What do you think V2 has?

It would be really tough to lay down this hand, but against OMC, I'm not sure how you are good -- unless he is just a terrible OMC.

(In my games, as with most of poker, donk bets depend on the player making them.)

I'd expect v2 to show up with AcKx a fair amount, KT sets and the occasional Arag nut flush.

V1 middling flushes. Most OMCs I see don't call raises from the blinds with bad suited Aces that often but we can't eliminate nut flushes from his range.

This.

An OMC donking the flop, usually means a weakish TP trying to "see where he's at" and is basically asking to be raised off his hand, imo. A chaser donking small is often trying to set a price for a draw. A LAG is sometimes donking small to induce a raise with strong holdings, etc.

C/C flop, then lead turn when a draw comes in is usually an indication that the draw hot for an ABC player. However, "hit" does not necessarily mean the nuts. From an OMC, leading pot on that turn could be KT, 5c6c-8c9c, and a discounted number of nut-flushes (most often wouldn't lead so big, hoping to get calls), As for hands that were made OTF that might take this line, AcKx ass mentioned above, and some combos of sets that were willing to let one card land free but are now worried about how drawy the board is getting.

In this case, with the second nut flush and the SF-redraw, obv never folding.

I wouldn't call a bet on the turn a "donk" bet. This is usually a hand that the villain believes is the best hand on the turn.

I mean...maybe V1 has AcXc but I don't think often enough to fold. I don't think OMC are calling those enough preflop. I don't know if they call 33 or 44 that often either. But I think they will call a set of tens and then bet big on a wet board when it hits.

I call but not super pumped like I otherwise would be with the second nuts and a redraw to the stone cold nuts.