WordWeb Online

1. Take in, also metaphorically
   "The sponge sucks up water well";
   - absorb, suck, imbibe, soak up, sop up, draw, take in, take up
    
2. Ingratiate oneself to; often with insincere behaviour
   "She is sucking up to the chairman";
   - cozy up, cotton up, shine up, play up, sidle up
    
3. Try to gain favour by cringing or flattering
   "He is always sucking up to his boss";
   - fawn, toady, truckle, bootlick, kowtow, kotow, smoodge [Austral]

Derived forms: sucked up, sucking up, sucks up

Type of: blandish, flatter, ingratiate

Encyclopedia: Suck up