When a bird roosts somewhere, it rests there. This rather old saying, ‘chickens have come home to roost', is normally used to mean that the bad things that someone has done in the past have come back to bite or haunt the individual. In other words, you are telling someone that he has to face the consequences of the deeds done in the past — though he may have committed them a long time ago.
A comment by a Noir Palace member (16 Nov 2021). Do you agree?!