一筒糊
刘星' father, his mother's ex-husband, is 胡一筒 a man who, to some extent, is like a dead dog.
So people nicknamed him 一筒糊.
Why 一筒糊?
一筒 is a tile of mahjong - Chinese game played by 4 people with 144 tiles. 糊 means you win the gamble.
Gamble is of course a bad thing. So this nickname implies that the exhusband might be a lousy gambler.