Acronym of pan-assay interference compound.

plural of PAIN

Feeling or experiencing pain.

(Britain) Someone or something that is annoying or frustrating.

(Canada, US, informal) A nuisance; a source of trouble or annoyance.

(idiomatic, slang) Someone or something which is annoying, irritating or inconvenient.

(vulgar) Something or someone that causes discomfort or frustration.

One must be willing to endure some inconvenience or discomfort in order to achieve worthwhile goals.

(chiefly Britain, slang) Someone or something very annoying.

generalized pains in the limbs or joints of children or adolescents (from many causes) / emotional or social problems associated with adolescence