1. A time-keeping device.
2. A phallic innuendo originating from the Torchwood television series, a spin-off of Doctor Who.
---"You still got that stopwatch? I think we've got a few minutes before the student get themselves in here, and I'm curious as to exactly how many minutes that might amount to."
-"You can’t fully enjoy using a stopwatch in just five minutes.”
---"I suppose you may have a point there.But in that case you still owe me, best keep it about in your pants for later then, before we find reason for you to draw it out."