by your fingertips
by (one's) fingertips
Narrowly avoiding problems or failure. They're clinging on by their fingertips out there—the other team's offensive is totally overwhelming them. Now that I have three small children to care for, I feel as if I'm hanging on by my fingertips every day.
by your fingertipsonly with difficulty; barely.
1990 Current History In early 1988 , United States Assistant Secretary of State Elliott Abrams said that General Noriega was clinging to power ‘by his fingertips’.