So, I've been playing against a lot of poppy players lately, and on most occasions its been solo top. They seem to be okay to deal with, a bit of a pain, but not overly deadly until late game. At late game they become somewhat impossible to kill. was wondering if there's any champion specifically, or something that can be done to counter her damage output late game, as well as dealing with her while you wait for the ult to wear off.

Only obvious thing i know to do is don't stand near walls. stuns evil.

You can't. You can just hope that top lane zoned her and hope that you can win before she gets all of her major items. Otherwise, your AD carry is going to get 1-shot and there is nothing you can do about it, turning it into a 4v5 almost instantly.

She's a beast, If she gets that far, i'm sorry.

Olaf is a counter pick for Poppy since they are always overconfident with their high armor.

Your fault for letting her get there. Hue.

I'm totally taking a guess here but I "THINK" banshee's veil will do something against her, I think it won't allow her stun and Q to do ****.

banshee will block only 1 ability, not all of it.

as for countering her late game, theres only 1 real option, dont let anyone build glass cannon cuz she'll pick out the squishiest target and destroy them. make sure each player is capable of surviving until her ult comes off and is able to kill her on their own.

the only champions who dont really need to build defensivly would be the ones that are able to get away from her, basically if you have a blink or a stun. stop her in her tracks and get out of there quickly.

also everyone must be paying attention to her since if your targeted by her and you just stand there, no one can stop her except for you and you can only buff the one thats being targeted.

but what you can do personal, there isnt much you can do to help unless your a support with some sort of healing/buff that you can provide.

I played with a Poppy on Saturday, she kept taking my kills as Tryndamere but I'm pretty good at farming, so it didn't phase me. Toward the end I was ganked and they took out our Tank (Amumu) too. They start pushing Mid hard and all of a sudden Poppy comes out of the Jungle like a shark and takes one out. Than runs into a bush.

Two of enemy team have the good sense to run, while 2 others chase and she comes back out to demolish one. Than as the other, begins to run, their support comes in to save and Poppy than jumps on the Support. She destroys the Support and than finishes off the fleeing enemy. Veigar was the last one left, it was so sad seeing him try to run from the monster known as Poppy.

Needless to say the game was over after that.

At late game, Poppy can lock onto a squishy target and destroy them. It's quite difficult to deal with her at that point, but there are a few things you can do:
If you're a tank, she's not going to target you, unless she's using you for invulnerability. If so, you have CC that you can put on her to keep her from doing so.
If you're a ranged dps, try getting Frozen Mallet. It'll make her devastating blow do more damage, but it'll also let you slow her so you can run away.
If you're a melee dps, you're going to have some issues. All her damage is melee, and it'll hurt you alot. You're going to have to build resistances.
If you're a support, you have to heal anyone whos targeted. If YOU'RE targeted, you're limited by your items. It's best to get a Shurelya's or Hourglass to try to keep away.
If you're a mage, you should have some form of CC. Use it on her, and consider an Hourglass.

She's a ***** to deal with. Try not to let any one person be the squishiest or let one person do zero damage whatsoever.