A walking car crash usually applies to people who are just a complete mess but try to advise other people how to live their lives. These people are unaware that they're like this but for others around them or who know them it's like watching a car crash only it's a human. Yes Seán, of course it could be said 'human car crash' would be more fitting but 'walking car crash' SOUNDS BETTER TO ME, OK!?
"He said I should try this new medication."
"Sure he's a WALKING CAR CRASH why would you take advice from him??"
"Sure he's a WALKING CAR CRASH why would you take advice from him??"
by dats wight wabbit July 13, 2022