So who am I here to scare off?那我来这儿是负责吓唬谁的

scare off:吓跑, 吓退

If you make a noise, you'll scare off the animals.

如果你弄出声响就会把动物吓跑。

I hope that this will not scare off half of my potential reader.

我希望这个方程式不会吓走一半我的潜在的读者。

If not, would you settle for a root beer?不然的话，你能满足于沙士啤吗

settle for:对 ... 感到满足, 勉强认可

I want $2000 for my car and I won't settle for less.

我要两千美元才卖车,低於这个价我可不要。

I'll settle for an "A" in my photography course.

我只要摄影课能得"a"就满足了。
The creep that's been bothering you...?不是有个讨厌鬼一直缠着你吗

bother:烦扰；使恼怒；使不安；费心

1.表示“打扰或麻烦某人时”，可用bother…with/about….
Don't bother your father about it now.
现在先不要麻烦你的父亲。

2,bother表示“费心”时，有多种表达方法，而且多用否定句式。bother (oneself) to do是不定式。bother (oneself) about后面跟名词或动名词。
Don't bother to answer this.

不要费心去答复它。

3.have bother (in)…（担心做某事）结构中，in后面要接名词或动名词，常可省略in。

I didn't have much bother (in) getting him to go with me.

我不担心找他和我一起去。