i Register
In some senses, blu-tack is marked as British. Watch for register when choosing this word.
noun
A solid putty-like adhesive, originally blue in colour, used to secure items to walls and other surfaces.
It was an April Fool hoax, of course. 31200 had been rigged up with a single lightweight wooden [name] plate (loosely held on by Blu Tack).
verb
To fix with Blu-Tack.
The power switch wasn't seated properly, and so I blu-tacked it into place.