Like this video? Subscribe to our free daily email and get a new idiom video every day!
make (something) up as (one) goes (along)
To improvise continuously as one does something; to do something without formal guidelines, structure, rules, etc. None of us really knew how to play the game, so we just made it up as we went along.I completely forgot the rest of my speech halfway through, so I just started making the rest up as I went along.You can't just make up data as you go, you have to provide real evidence to support your hypothesis!