When a woman says, 'I don't wish to mention any names', it means it ain't necessary to mention any names.
Nobody can be as agreeable as an uninvited guest.
Many a family tree needs trimming
Laugh, and the world laughs with you. Weep, an' it keeps on laughin'.
It used to be that a fellow went on the police force when everything else failed, but today he goes in the advertising game.
Nobody kicks on being interrupted if it's by applause.