Chilworth roundabout 

when a townie or 'chav' has line or lines shaved around his (or her) head, that is a 'chilworth roundabout'. Im not really sure where it comes from. I think it may be an insult .

Look at that chavs chilworth roundabout

Chilworth roundabout by Mr S Bad January 3, 2005

Chilworth roundabout 

1. The beginning of the M3 motorway just outside Southampton, UK.
2. In male orgasm, the point of no return.

Not the fucking doorbell! I'm at the Chilworth roundabout! Urrghh!

Chilworth roundabout by Richard Braithwaite October 15, 2003