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Wiktionary
fill up

vb. 1 To make a container full. 2 To become full. 3 (context idiomatic colloquial English) To annoy#Verb, or displease#Verb, by taunting#Verb, or by excessive nagging#Verb. 4 To satisfy someone's hunger. 5 (context poker slang English) To make a full house on the turn or the river.

WordNet
fill up
  1. v. make full, also in a metaphorical sense; "fill a container"; "fill the child with pride" [syn: fill, make full] [ant: empty]

  2. become full; "The pool slowly filled with water"; "The theater filled up slowly" [syn: fill] [ant: empty]

  3. fill or stop up; "Can you close the cracks with caulking?" [syn: close]

  4. eat until one is sated; "He filled up on turkey" [syn: fill]