lay something on thick
• grossly exaggerate or overemphasize something.
• "the message is laid on with a trowel for three hours"
Similar:
exaggerate,
stretch the truth,
overdo it,
overstate one's case,
embellish the truth,
flatter,
pay extravagant compliments,
give fulsome praise,
over-praise,
soft-soap,
pile it on,
lay it on with a trowel/shovel,
ham it up,
sweet-talk,