what?...

...surely a handroll is a delicacy from the local Sushi shop stuffed with tofu or softshell crab or vegetables?

But no
it is also a piano keyboard that works!...
...and plays chopsticks or two handed 'happy birthday' (junior's concert piece for Saturday's concert) and no doubt much much more.
...and is 'going straight to poolroom' (or 'the van'? tucked up in the perfect 'handroll' (extra)