History of Words and Phrases
Blood, sweat and tears: The phrase was made popular from the first speech by Prime Minister Winston Churchill on May 13, 1940.
Bone up on: Victorian Henry Bohn published translations of the classics, popular with students cramming for exams. The phrase means to study intensively.
Robot:Comes from the Czech word "robota" which means drudgery. Thus "robot" means to do tedious work for humans.