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The act of a chinese roll-on is when a guy ejaculates into a girls armpit, and rolls the tip of his penis in an up-and-down motion.
"It was a hot summers night so I gave her the good ol' Chinese Roll-on to keep her deodorised."

"She let me give her a Chinese Roll-on and I was inlove."
by hitchhiker September 21, 2011
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