(chiefly Britain, informal) A tramp or homeless young person with poor cleanliness.

(slang) Dried eye mucus.

(chiefly UK and Ireland, informal) A member of an urban subculture with roots in punk and grebo, characterized by antiestablishment attitudes and an unkempt appearance.

Having a crust, especially a thick one.

(informal, figuratively, of a person or behavior) Short-tempered and gruff but, sometimes, with a harmless or benign inner nature.

(informal) Of very low quality; crude visuals or harsh, granular sound. (Can we add an example for this sense?)