'lap up' definitions:

Definition of 'lap up'

From: WordNet
verb
Take up with the tongue; "The cat lapped up the milk"; "the cub licked the milk from its mother's breast" [syn: lap, lap up, lick]

Definition of 'lap up'

From: GCIDE
  • lap up \lap up\, v. t. [See lap, v. i.]
  • 1. To take up (drink or food) with the tongue; to drink by licking up. [1913 Webster]
  • 2. (fig.) To accept or enjoy enthusiatically and uncritically; as, to lap up praise. [PJC]

Synonyms of 'lap up'

From: Moby Thesaurus