undeserved favour

To apple-polish is to ingratiate (engraciar) yourself or curry favor with someone, but usually through flattery (adulación) or extra efforts beyond what’s required or expected. Brown-nose, Ingratiate, Flatter, Butter up, Suck up to, Curry favor, Kowtow

noun and adj

/ˈsɪkofant/

Something that's likely to be stolen.