Bianchi Pista or Swobo Sanchez?

I am 'The Thread Ender'. Most threads i take part in, i've discovered, i bring to a grinding halt with some ill-informed irrelevant comment. If there was a soap opera called 'ThreadEnders' I'd be in it, at the very end, in the background, sweeping the streets or buffing a wing mirror. or something.... i'll get me coat.

I don't get the 'it's not my hat he chewed' joke.