零起点美语-It's on the tip of my tongue.

It's on the tip of my tongue.

就要说出口了。
A: What's the name of the singer who sings this song?
B: I can't remember.
A: It's on the tip of my tongue. I think it starts with a "B".
甲：唱这首歌的歌手叫什么名字？
乙：我记不得了。
甲：我就是想不起来。我想应该是以"B"开头吧。