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 .
by Mr S Bad January 04, 2005
1. The beginning of the M3 motorway just outside Southampton, UK.
2. In male orgasm, the point of no return.
2. In male orgasm, the point of no return.
by Richard Braithwaite October 15, 2003