An expression in the class of throatcore
used by a man during oral sex of a violent nature where the woman's head is no longer in motion, but is stationed by the man's hands as he gives sharp, deep pelvic thrusts into her mouth and throat regardless of whether or not she is able to adapt her throat to the depth of the thrusts and regardless of whether or not she is enjoying it. In a less aggressive scenario of this nature a woman might gag, but during fellatio of this caliber of violence she is apt to regurgitate entirely. Hence the man, upon sensing that moment, might commonly utter the expression "get ready to vomit."
"Yeah, bitch, get ready to vomit!"