Often regarded as 'upper class' slang for an attractive woman. 'Top' referring to her position on a scale of 1 to 10.
by TimRog December 22, 2006
The line of titty owners that stand behind Clarkson, Hammond and May while doing their piece to the camera during filming an episode of the eponymous TV show.
by farge bofflenerp October 26, 2009