Sarah: You can't wig out .

莎拉：你不能激动。

He'll wig out when he read the letter.

他看了信将会激动得发狂。

LL: To wig out means the same as to freak out.

噢，wig out跟freak out意思一样，就是让人激动，或者把人吓坏了。

I wouldn't mind having a pet rat, but I don't want to make all of my friends wig out, either.

我想很多人，特别是女孩子，大概会被你的宠物吓跑。 这样你想交女朋友的希望就更加渺茫喽！