submission

a slave kneels bending at the waist, placing her cheek to the floor, then takes her Master's right foot and places it upon her neck, her arms behind her back with her wrists crossed, a girl might assume this position if/when she has displeased her Master, as it show complete submission, His foot on her neck showing that she offers Him her life

an example

softly a girl melts to her knees, leaning forward she bends from her tiny waist, placing her cheek to the floor, slender arms reach and takes her Master's right foot and places it upon her long and slender neck then move to the small of her back to cross them at her dainty wrists, a girl offering her life in complete and total submission

quotes

She fell to her knees before him, and lifted her head to regard him. "I will be your slave," wrists crossed, as though for binding. She was very beautiful. "I am your slave," she said, "--Master."
Hunters of Gor page 16

'Submit,' he said. She looked at me, wildly, piteously. I aided her. I showed her how to kneel back on her heels, her arms extended to him, wrists crossed, her head down, between her arms. 'Say,'I submit,'' I said. "I submit,' she said. He bound her wrists tightly before her body."
Slave Girl page 401