slip me the tongue ?
Alex laughed. “Roger Markowitz. He took me to senior prom. I had the most totally awesome puffy sleeves on my dress. Electric blue, naturally. Roger tried to slip me the tongue in the limo on the way to the ballroom, but he was so nervous that he threw up on me. I spent the whole dance in the ladies’ room trying to clean up. I broke up with him that night. One might describe it as an epic romance.”
I would like to know what does "slip me the tongue " here mean? Does it mean a kiss? Thanks.