How to say it in American English: over the deep end

MC：Jessica 在北京学汉语，她的中国朋友要是遇到了不知道用美语怎么说的词，就会来请教她。今天是Lulu要问的：抓狂。

Jessica: Morning Lulu!

Lulu: Jessica!! 我必须跟你说说，我都快气死了!

Jessica: 你怎么啦?

Lulu: 还不是我室友! 她特别不自觉，我所有的洗发水，擦脸油都随便用，还动不动就带男友回家! 我都快要抓狂了! 抓狂! scratch crazy!

Jessica: haha... 抓狂不是 scratch crazy, 你可以说，she's pushing me over the edge.

Lulu: over the edge?

Jessica: 对，edge is spelled e-d-g-e,edge 边缘。My roommate always brings her boyfriend over to our apartment. I feel like I'm living with a couple. It's really pushing me over the edge.

Lulu: push somebody over the edge, 就是使某人抓狂。这么说来，她可真是 push me over the edge! 昨天她又把男朋友带会公寓，我警告她说，这是最后一次了! 这又该怎么说呢?

Jessica: Oh, You can say: that's the final straw.

Lulu: final straw, 这个说法真形象! 好，我今天回去就再这么告诉她一次!

Jessica: You know what Lulu, my roommate is actually doing the same thing. She always uses my things, it's really annoying! You and I are in the same boat.

Lulu: in the same boat? 我们在一条船上? 哦我明白了，就是说我们处境相同，对不对?

Jessica: That's right! We both have annoying roommates-- we're in the same boat. Now, tell me what you've learned today!

Lulu: 第一：使某人抓狂叫 push sb over the edge; 第二，警告说这是最后一次，可以讲 that's the final straw；第三，处境相同，叫 in the same boat.

A: My neighbor is pushing me over the edge!

B：I know you're upset, 杨琳。Maybe you should report the problem to the building's manager and let him sort things out.

A：You're right. There must be other people in the building who are in the same boat with me! We should all go to the manager and complain. 大家一起去告他的状！

B: I'm sure things will work out. Now let's talk about something else. My Mom's birthday is coming. Do you have any gift ideas?

A：Hmm, 送礼物给妈妈？你以前都送什么？

B: Home-make cakes, flowers, skin care products, gift cards... I mean, I've given her almost all kinds of gifts a Mom would want. I'm out of ideas this year.

A: Don't worry. 只要你去商场逛一逛，肯定会发现适合送妈妈的礼物，只有你想不到的，没有商家做不出的！

B: Okay. I'll go shopping then!

A：说到逛商场买礼物，今天的“美语三级跳”就要讲一个男朋友给女朋友买生日礼物的故事。

B: How sweet!

A：嘿嘿，你想别急着夸这个男朋友，听了节目你就知道是怎么回事了！