lick-ass
vulgar A person who flatters, fawns over, or eagerly agrees with others, especially people of higher authority, as a means of currying favor. (Also spelled "lickass.") Primarily heard in US. Well, it's no wonder a lick-ass like you is the teacher's favorite!
lick-arse
vulgar A person who flatters, fawns over, or eagerly agrees with others, especially people of higher authority, as a means of currying favor. (Also spelled "lickarse.") Primarily heard in UK, Ireland. It's no wonder a lick-arse like you is the teacher's favourite!