1<svg>
2  <defs>
3    <filter id="goo">
4      <feGaussianBlur in="SourceGraphic" stdDeviation="10 10">
5      </feGaussianBlur>
6      <feColorMatrix
7        values="
8          1 0 0 0
9          0 0 1 0 
10          0 0 0 0
11          1 0 0 0
12          0 0 25 -10
13        " type="matrix"></feColorMatrix>
14    </filter>
15  </defs>
16</svg>

1.goo {
2  filter: url(#goo);
3}