full of it

1

Also, full of the devil. Mischievous, naughty. For example, The youngsters were full of it today, giving the teacher a hard time, or Bill is full of the devil, hiding his roommate's clothes and teasing him mercilessly.

2

Talking nonsense, as in He claims to have fixed the dock, but I think he's full of it. This usage is a euphemism for ruder idioms like full of crap.

Words nearby full of it

full moon, full nelson, full of beans, full of crap, full of hot air, full of it, full of oneself, full pitch, full powered, full professor, full radiator