something horrible, discusting, sick.

Something/someone poor, gross, ugly, "ew".

something which is 'rank' is disgusting - for example it may be used with reference to food or smells or mental images.

something that smells horribly bad, or disgusting

Short term for rancid.

Another word for gross or mingin

Rank - to be horrible or discusting. Most commonly used to describe something/someone awful.