To be serious or telling the truth.
A newer version of this phrase is "no cap".
Person1:" Bro when you gonna give me back my 5 dollars."
Person2: "No lie bro i got you on Wednesday."
A lie that is typically very absurd, but very obviously a lie.
He said he beat battle-toads on his first try, it's obviously a Declan lie.
When the complete truth isn’t told to hide certain information.
She just didn’t tell you everything it was a blue lie
When you lie just to get to have sex, as to avoid blue balls.
He told me a blue lie so we did the squelchy, but then he never gave me that modelling job after all.