purse your lips 撅起嘴唇
pursed lips 紧缩的嘴唇
A: Why did you purse your lips just now?
A：你刚才为什么撅嘴？
B: I was just thinking about how to answer.
B：我只是在想该如何回答。
1) 撅起嘴的
2) 紧闭嘴唇的
3) 收紧的
1. 撅起（嘴唇）
verb
1. to contract or tighten the lips into a small, rounded shape, often as an expression of disapproval or concentration.
Synonym: pucker