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1.
A warning given when someone tries to talk around someone on a certain subject, but the person is very familiar with the subject matter.
Employer: It seems you tested positive for marijuana.

Employee: I was at a party and people were smoking around me.

Employer: The party must have been in a Mini Cooper with the windows rolled up to have this high of a concentration in your urine. Don't bullshit a bullshitter. Clean yourself up or you're out.
by R.J.H December 26, 2009

Words related to Don't bullshit a bullshitter.

bullshit lie pull the wool over your eyes smooth talk truth
 
2.
The words of wisdom received when a person tries to deceive someone who is good at deceiving people.
So I told my dad "I drove your car to the party and was drinking, but my friend who wasn't drinking drove your car home." My dad said, "Son, I'm a used car salesman, Don't bullshit a bullshitter."
by largestcockintheworld July 23, 2011