(chemistry) Any theory that relates collisions among particles to reaction rate; reaction rate depends on such factors as concentration, surface area, temperature, stirring, and the presence of either a catalyst or an inhibitor.

(Britain) Alternative form of take it up the ass

(Britain, idiomatic, informal) Successively, in succession; one after the other. / (idiomatic, informal) Continually busy. / (UK, slang) on the run; fleeing

(idiomatic) To reach a low point in one's pursuits.

Were it not for God's help, someone could have suffered that outcome.

(Ireland, colloquial) admonishment or condemnation from the clergy.

A recognition that others' misfortune could be one's own, if it weren't for the blessing of the Divine, or for fortune or fate.

(games) A children's game involving pinning a piece of material on a specified spot while blindfolded. / (by extension) Any attempt to aim something somewhere while handicapped in doing so.

(obsolete, nautical) To fill the hollow in the bottom of a sounding lead with tallow in order to discover the nature of the bottom by the substances adhering.

(idiomatic) To try or guess at something without having any knowledge about the subject.