arse lick

repugnant public display of obsequious adulation towards an individual. Excessive flattery, for improving personal gains (social, professional, financial, sexual etc.)

Alannah is a true arse lick who will say and do anything to be Harry's groupie and suk dik, jus coz he has a famous sister, even though he is an seriously immature prick who thinks he is ubercool and thinks he is RIGHT about everything but actually knows nothing.