post-it
US /ˈpoʊst.ɪt/
UK /ˈpoʊst.ɪt/

1.
a small piece of paper with a strip of glue on its back, used for attaching notes to surfaces temporarily
:
•
She left a Post-it note on the fridge.
•
I wrote a reminder on a yellow Post-it.
a small piece of paper with a strip of glue on its back, used for attaching notes to surfaces temporarily