When a girl chicken gives birth to a live cock while sucking another cockâs cock.
The reason itâs called rotten plum is because the cock being born is dirty, because the chicken is sucking the cock of another cock while the cock is being born.
Farmer Joe: âOh no my chicken has rotten plum!â
Chicken: âToo many cocksâ
Farmer Joe: âwhat the fuck. Whyâd my chicken talk?â