hike up
verb1
Idiomatic To lift; to tug or pull upwards.
- He hiked up his sagging trousers.
2
Idiomatic To raise or increase sharply; to hike.
- They tried to make more money by putting lots of salt in the popcorn and hiking up the price of drinks.
3
Idiomatic, Of clothing To move upwards; to ride up.
- He was wearing a maroon cashmere muffler which had hiked up on his neck, giving him next to no protection against the cold.1955, J. D. Salinger, “Franny”, in Franny and Zooey, Boston, Mass.: Little, Brown and Company, published 1991, →ISBN, page 4: