Definition of "shaky"

For the college clinician, restless nights after letting a shaky student walk out of the office are an occupational hazard. Are the student's safety assurances credible? Will he or she make it safely through the weekend?

2006, Paul A. Grayson, Philip W. Meilman, College Mental Health Practice, page 11

Villa had plenty of opportunities to make the game safe after a shaky start and despite not reaching any great heights, they were resolute enough to take control of the game in the second half.

2011 April 10, Alistair Magowan, “Aston Villa 1 - 0 Newcastle”, in BBC Sport‎