pitch a line/story/yarn

pitch (one) a line

To tell a lie or only part of the truth in order to convince one of something or to avoid the consequences of something. Don't you dare pitch me a line about being at the library. I want to know exactly where you were tonight. I suspect he's just pitching a line about where all that money came from.
See also: line, pitch
Farlex Dictionary of Idioms.

ˌpitch a ˈline/ˈstory/ˈyarn (to somebody)

(informal) tell somebody a story or make an excuse that is not true: He assured me that it really happened, but I reckon he was just pitching me a line.
See also: line, pitch, story, yarn
Farlex Partner Idioms Dictionary
See also:
  • a straw will show which way the wind blows
  • (I) wouldn't (do something) if I were you
  • a fast talker
  • a/the feel of (something)
  • a necessary evil
  • all right
  • (one) doesn't give a rip (about something)
  • (one) could use (something)
  • a crack at (someone or something)
  • (one) doesn't give a hoot (about something)