Dear Ninon,
The Idiomatic Expression: "To put someone �s nose out of joint" =
To upset or replace a favourite, or a person who has ALWAYS performed this duty.
To supplant someone who REGULARLY does something, and therefore make him/her look foolish, by embarrassing, frustrating, or disconcerting him/her.
To take the place of someone who has ALWAYS been loved by another person, or by a group.
To make someone take SECOND place.
To upset, irritate, or sadden someone, by doing something that that other person takes PRIDE in doing, but now, no longer.
"Three-year-old Tom has always been the favourite of the family, but now that the new baby has arrived, that will certainly put little Tom�s nose out of joint."
Les Douglas