on thorns

on thorns

Nervous or ill at ease. The young man beside me, on thorns due to the train's delay, got up and began pacing back and forth down the length of the cabin. The situation left me on thorns: Should I follow Molly, or stay and wait for help?
See also: on, thorn

on thorns

continuously uneasy, especially in fear of being detected.
See also: on, thorn