(idiomatic) May heaven forbid it; expresses the desire that something does not happen.

(dated or humorous) Used to express that one hopes that something does not happen: God forbid, heaven forbid.

plural of tree of heaven

(dated, exclamation) An exclamation of surprise or shock.

(UK) Expression of surprise.

(UK, mildly blasphemous) Expression of alarm or amazement.

(dated (chiefly 1870s), historical, offensive) peanut gallery

Alternative form of God knows

plural of nigger heaven

A mythical tree or vine which figures in some primitive beliefs as affording the means of ascent from underground regions to the surface, or from the surface to the sky. Forms of this myth are found in Malacca, Borneo, Celebes, New Zealand, and Polynesia.