You can't play with it as if it were a laboratory rat.

Nice to know that you Brits are being treated like laboratory rats.

The learned authors may pay too much heed to laboratory rats.

He's nothing but a laboratory rat who lived inside a microscope until a year ago.

You could use him as a sort of laboratory rat to forecast what was going to happen next.

All this is presumably an exciting experience in the life of a laboratory rat.

But laboratory rats deprived of sleep die after 14 days.

He says it is quite common for academic researchers to use graduate business students as laboratory rats.

My mother didn't raise me to be a laboratory rat.

Nor does the idea of scurrying around like a laboratory rat under the hot summer sun hold any appeal for him.