Definition
To have one's fly (zipper) undone.
To fly under the radar; to act in a discreet or sneaky fashion.
See Also
- fly without a licence
How People Actually Use It
The opposite of the phrase "fly high" used when someone dies and you say fly high as in their in heaven now.
"Man fuck yo mama that bitch gonna fly low, she prob looking up at us right now"
Source: Urban Dictionary