under the wire
undetected,not getting found out,
I kept under the wire
in just under the wire
When people say "in just under the wire" means that someone did something at the last minute or moment, or something happened at last minute, for example:
" - I'm sorry , i didn't hear my alarm.
- So that's why you came in just under the wire? "
- So that's why you came in just under the wire? "