søg på et hvilket som helst ord, for eksempel the eiffel tower:
 
1.
in reference to being told something unbelievable or shocking, means to hold on and go back to what was just said; request to repeat and readdress a comment.
"Whoa. Back up the bus - what did you just say?"

"Hang on - back up the bus. You were doing WHAT last night?!"
af mypseudonym2012 26. september 2011