a dark oil consisting mainly of hydrocarbons

not carefully or expertly made

conspicuously and tastelessly indecent

not refined or processed

belonging to an early stage of technical development; characterized by simplicity and (often) crudeness

devoid of any qualifications or disguise or adornment

not processed or subjected to analysis

a dark oil consisting mainly of hydrocarbons

in a crude or unrefined manner

in a crude and unskilled manner

a wild or unrefined state

an impolite manner that is vulgar and lacking tact or refinement

an unpolished unrefined quality