lay it on

lay it on or lay it on thick

also put it on thick or spread it on thick or lay it on with a trowel

 {v. phr.},  {informal}

To persuade someone by using very much flattery; flatter.

Bob wanted to go to the movies. He laid it on thick to his mother.

Mary was caught fibbing. She sure spread it on thick.

Compare: PUT ON (2b).