(slang) Very addicting.

A device that demonstrates conservation of momentum and energy via a series of swinging spheres. When a sphere at one end is lifted and released, the resulting force travels through the line and pushes the opposite sphere upward, repeating the process as it swings back down.

(informal) To arouse a person's interest or passion; to excite someone.

(archaic, informal) A burglar or safebreaker.

Cancer borealis, a strong-clawed crab found on the Atlantic coast of North America.

(slang, UK, Australia, transitive) To flirt with; to approach and speak to (someone), seeking romance, love, sex, etc.

plural of tough nut to crack

(rare) To carry out a simple task in an overcomplicated manner.

(idiomatic) To use significantly excessive force to carry out an action; to do something overzealously.

Alternative form of brain cramp