A clay-like substance used to stick things together, and be able to remove them again.
Often used for posters.
How did you stick your poster to the wall? I stuck it up with blu-tac!
by bloodbanx.com January 26, 2005
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A sticky substance that sticks things to the wall.
Can I have the Blu Tac please honey!
by shoethousond October 19, 2019
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Get the Blu Tac neck gaiter and mug.