razor's edge, on the

on the razor's edge

To the point of doing something risky or dangerous. Please, you just like him because he's the bad boy who dances on the razor's edge with his motorcycle. I like to live on the razor's edge sometimes and go skydiving.
See also: edge, on

razor's edge, on the

In a critical or dangerous predicament. This analogy dates from Homer’s time (Iliad, ca. 850 b.c.): “To all it stands on a razor’s edge, either woeful ruin or life for the Achaeans.” W. Somerset Maugham used it as the title of a philosophical novel (The Razor’s Edge, 1944) exploring the meaning of life. Alan White used it in The Long Silence (1976): “He was living on a razor’s edge. Sooner or later, the Germans were going to begin to suspect.”
See also: on