people who dispute that a task is possible should not impede those people who attempt to do it

(computer science, graph theory) A type of depth-first search in which each row of the tree is searched incrementally, simulating a breadth-first search with less memory usage.

(colloquial, humorous) To take a risk for the chance of some benefit or reward.

To be seized with a sudden (often ill-advised) notion.

inattentive / incapable of rational thought

To gain the advantage in a contest.

Alternative spelling of it ain't over 'til the fat lady sings

(slang) tinea cruris; jock itch

To have few problems.

(archaic) To appear as a star actor, especially on a provincial tour.