Metaphors referring to body parts

economic concept popularized by Adam Smith

obscene hand gesture

metaphor for intense emotional/physical stress or pain one feels at experiencing great and deep longing

theorem which states that there is no nonvanishing continuous tangent vector field on even-dimensional n-spheres

stylistic device to acknowledge previous discoveries

reinforcement learning problem exemplifying the exploration–exploitation tradeoff

displaying fortitude and stoicism in the face of adversity; exercising great self-restraint in the expression of emotion

English expression