Source : WordNet®

suck up
     v 1: take in, also metaphorically; "The sponge absorbs water
          well"; "She drew strength from the minister's words"
          [syn: {absorb}, {suck}, {imbibe}, {soak up}, {sop up}, {draw},
           {take in}, {take up}]
     2: ingratiate oneself to; often with insincere behavior; "She
        is playing up to the chairman" [syn: {cozy up}, {cotton up},
         {shine up}, {play up}, {sidle up}]
     3: try to gain favor by cringing or flattering; "He is always
        kowtowing to his boss" [syn: {fawn}, {toady}, {truckle}, {bootlick},
         {kowtow}, {kotow}]