When a woman suffocates you with her entire vagina and perineum or when a large lesbian suffocates an opposing gay male in a fight by placing her entire vagina and perineum over the small gay mans head resulting in instant death
Transitive verb: When a female cuts off her sex partner's breathing while sitting on his or her face.
I almost got muffocated to death last night, but just before I lost consciousness I bit her pussy and she rolled off me. She thought I was just being a dick and kicked me in the face a couple times, though.