tack up
Fix something to a wall with small nails; or get a horse ready to ride
Meanings
To attach a piece of paper, poster, or notice to a wall or board using tacks or pins
"She tacked up the new class schedule on the notice board."
(Equestrian) To put the saddle, bridle, and other equipment onto a horse in preparation for riding
"It took her fifteen minutes to tack up her horse before the morning lesson."
(Sailing) To steer a sailing boat on a zigzag course into the wind through a series of tacks
"They tacked up the estuary against a stiff headwind for over an hour."
The wall/display sense is very common in everyday contexts — offices, classrooms, bedrooms. The equestrian sense ('tack up a horse') is specific to horse-riding communities but is well-established and standard within that context.
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