CRACK

a line on the surface of something along which it has split without breaking apart

a sudden sharp or explosive noise

a joke, typically a critical or unkind one

enjoyable social activity; a good time

an attempt to achieve something

a potent hard crystalline form of cocaine broken into small pieces and inhaled or smoked

break or cause to break without a complete separation of the parts

make or cause to make a sudden sharp or explosive sound

find a solution to; decipher or interpret

tell (a joke)

decompose (hydrocarbons) by heat and pressure with or without a catalyst to produce lighter hydrocarbons, especially in oil refining

very good or skilful