Bitter
This refers to a basic flavour type which is detected primarily at the back of the tongue.

Earthy
Refers to a herb/humus/mushroom note of a coffee. Predominantly found in Indonesian varieties.

Exotic
Refers to a coffee with unusual aromas and flavour notes (floral, berry, etc.).

Fruity
Coffee with berry-like or tropical fruit aromas is said to be fruity. 

Body
Refers to the thickness of a coffee. The body can be light, medium or full.

Brisk
A coffee with high acidity is often described as brisk.

Mild
A coffee with mellow flavour characteristics.

Mouth feel
The sensation perceived in the mouth when you ‘cup’ (taste) a coffee.

Nutty
A flavour that reminds you of nuts.

Vibrant
This term refers to coffee with a brisk acidity that dances on the tongue before quickly disappearing.

Acidity
Refers to the acidity or briskness of a coffee. A certain amount of acidity is required in a coffee.

Flat
Coffee that comes into lengthy contact with oxygen loses its freshness and becomes bland.

Sweet
Is a desirable property of coffee, associated with a pleasant flavour and mouth feel.

Mellow
Coffee with low acidity and a mild flavour is described as mellow.

Spicy
An aroma that reminds you of a certain spice.