when one person is keeping tabs (special attention to what someone is doing at all times) on another person.
RELATIONSHIPS.---
When the girlfriend is keeping watch on the boyfriend's ex.
"She definitely still wants him back. I've had her on bitchwatch for a while now."

or,

When the ex is keeping tabs on the girlfriend.
"I still want him back. She's been on my bitchwatch since they started talking."
by G.Mayhem July 7, 2008
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