bee in one's bonnet in French
bee in one's bonnet in French
fixette
(idiomatic) Something of particular interest or concern; an obsession.
idée fixe
(idiomatic) Something of particular interest or concern; an obsession.
manie
(idiomatic) Something of particular interest or concern; an obsession.
marotte
(idiomatic) Something of particular interest or concern; an obsession.