plural of pain in the bum

A painful bottom as a result of riding a mount or vehicle with (or without) a saddle

(law) A species of damages that one may recover for physical or mental pain that results from a wrong done. / Used other than figuratively or idiomatically: see pain, suffering.

(medicine, pathology) A sensation of pain coming from a part of the body that has been amputated, or in which the nerves have been destroyed.

The minimum intensity or duration of a sensory stimulus applied to a living being at which it becomes considered painful.

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

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

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

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

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