Source : WordNet®

suck in
     v 1: take up as if with a sponge [syn: {take in}, {sop up}, {take
          up}]
     2: attract by using an inexorable force, inducement, etc.; "The
        current boom in the economy sucked many workers in from
        abroad" [syn: {suck}]
     3: draw in as if by suction; "suck in your cheeks and stomach"
        [syn: {draw in}]
     4: remove as if by suction; "draw in air" [syn: {aspirate}, {draw
        in}]