From Longman Dictionary of Contemporary Englishbrown-noseˈbrown-nose verb [intransitive, transitive] informalFRIENDLY to try to make someone in authority like you by being very nice to them – used to show disapproval —brown-noser noun [countable] —brown-nosing noun [uncountable]→ See Verb table
Examples from the Corpus
brown-nose• Kids don't want other kids to think they're brown-nosing, so they don't tell teachers when they've enjoyed a class. 