(not) believe a word of it

to not believe that something is true.

Have you heard what they're saying about Andrew? I don't believe a word of it.

• on the town
• on the trot
• on the verge of
• on the verge of doing something
• on the wagon
• on the warpath
• on the way
• on the whole
• on the wing
• on the wrong side of the law
• on the wrong track
• on thin ice
• on time
• on tod
• on toes
• on top of
• on top of something
• on top of that
• on top of the world
• on tour
• on track
• on trial
• on view
• Onwards and upwards!
• onwards and upwards