flat out

Adverb

• at top speed
  • he ran flat out to catch the bus
    
  • he was off down the road like blue murder
    

• in a blunt direct manner
  • he spoke bluntly
    
  • he stated his opinion flat-out
    
  • he was criticized roundly
    

Related words

• Synonyms: 
  like blue murder , bluffly , bluntly , brusquely , roundly