To raise and turn under(the upper lip), as in snarling or showing scorn.

撇嘴，翘嘴翘起或撇起（上嘴唇），如在咆哮或表示轻蔑时。

youdao

Under her long eyelashes was a pair of sleepy seemingly drunken dreamy big smiling eyes; her full round upper lip seemed to be angrily pouting at a lover.

长睫毛上一双欲眠似醉、含笑、带梦的大眼睛，圆满的上嘴唇好像鼓着在跟爱人使性子。

youdao

Under her long eyelashes was a pair of sleepy, seemingly drunken, dreamy, big smiling eyes; her full, round upper lip seemed to be angrily pouting at a lover.

长睫毛上一双欲眠似醉、含笑、带梦的大眼睛，圆满的上嘴唇好像鼓着在跟爱人使性子。

youdao