not trust someone as far as you can throw them

not trust (someone) as far as (one) can throw (them)

To be very suspicious of someone; to not trust or believe someone. You want me to tell our plans to Jill? I don't trust Jill as far as I can throw her. The government is asking us to believe that they'll apply the new tax fairly, but I wouldn't trust them as far as I can throw them.
See also: can, far, not, throw, trust
Farlex Dictionary of Idioms.

not trust someone as far as you can throw them

not trust or hardly trust a particular person at all. informal
See also: can, far, not, someone, throw, trust
Farlex Partner Idioms Dictionary
See also:
  • not trust (someone) as far as (one) can throw (them)
  • not trust (someone) farther than (one) can throw (them)
  • I wouldn't trust (someone) farther than I could throw (them)
  • not trust someone as far as you could throw them
  • I wouldn't trust (someone) as far as I could throw (them)
  • a dog in the manger
  • (one) puts (one's) pants on one leg at a time
  • get back to (someone) on (something)
  • (one's) heart goes out to (someone)
  • a fan of (someone or something)