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Wiktionary
hike up

vb. 1 (context idiomatic transitive English) To lift; to tug or pull upwards. 2 (context idiomatic transitive English) To raise or increase sharply.

WordNet
hike up
  1. v. pull up; "hitch socks and pants" [syn: hitch up]

  2. increase; "The landlord hiked up the rents" [syn: hike, boost]