A lipsy
A guy who's lipsy is when he doesn't know when to stop kissing a girl and just keeps going like an idiot.
'He was lipsy and kissed her for ten minutes straight. She looked like she wanted to die.'
'He was so lipsy, he kissed her on the forehead and then her cheek and then her neck.'
'He's the worst lipsy ever. He kissed her until she begged him to stop.'