The act of two lips showing affection towards each other /making love
That couple over there is totally having lip sex
by Km26 June 23, 2015
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a pet name for a significant other, also can be used to refer to a guy or girl with nice lips or big lips.

or even someone who as "dick sucking lips."
"Man, that guy has nice sex lips!"

"Sex Lips can you grab me a towel?"

"Look at those sex lips on that girl"
by Rock Pile March 2, 2009
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Usually refers to the features of a man who has strangely feminine lips. Such features usually make someone look like they keep some kind of vilainous sexploitation secret IE. Sex trafficker, pedophile, rapists or other sexual aggressor.
"You stay over there with your weird secret sex lips."
by Mr B*tchMaker March 14, 2019
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