brown·nose or brown-nose 
(brounnōz′)
(brounnōz′)tr.v. brown·nosed, brown·nos·ing, brown·nos·es or brown-nosed or brown-nos·ing or brown-nos·es
Informal
Informal
To curry favor with in an obsequious manner; fawn on.
[From the image of an obsequious person whose nose becomes soiled with excrement in kissing the buttocks of someone from whom favor is sought.]
brownnose′ n.
brownnos′er n.