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1. lay it on thick
to exaggerate, overstate, especially said of flattery an attempt to coax
Man, He sure did lay it on thick when he tried to get his girlfriend to come home form the party early.
2. Lay it on Thick
To honk at a person, place or thing for an excessive period of time. Usually done to express negative emotions.

Not to be confused with a dollop of daisy, which can be a single or series of short honks. A dollop of daisy is usually used to express positive emotions.
Bobs lay it on thick at Tranny!