slave lips

a slave turns her head up to her Master, puckering her lips as she does, she waits motionless, forbidden to move until her Master's kiss releases her

an example

hearing her Master's command a girl seductively turns her head up to her Master, she puckers warm soft lips and awaits motionless till a girl is released

quotes

Similarly, I was not required to respond to certain sorts of commands, for example, to make "slave lips," pursing my lips for kissing, or to writhe slowly before my viewers.
Kajira of Gor page 224