pin (something) up on (something)(redirected from pin them up on)
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pin (something) up on (something)
To fix or fasten something at a high position on something or some surface with pins or some similar fastener. Would you mind pinning this notice about our upcoming show up on your notice board? I'm pinning posters of my missing dog up on lampposts all over town.
pin something up on(to) somethingand pin something up
to attach something to something, for display, with pins. I pinned the picture up onto the bulletin board where everyone could see it. I pinned up the picture.