(law) Initialism of proof of service. / (medicine) Initialism of peripheral oxygen saturation. / (linguistics) Initialism of part of speech. / (retail) Initialism of point of sale or point of service.

(Internet, text messaging) Initialism of parent over shoulder (i.e. observing the young user's conversation)

plural of po-po

(UK, slang) Clipping of positive. / (slang) Clipping of HIV positive.

plural of po

plural of PO

(colloquial, somewhat derogatory, countable) Synonym of police officer. / (colloquial, somewhat derogatory, uncountable) Synonym of police.

(obsolete) A peacock.

(UK, Australia, New Zealand, colloquial, dated) A chamberpot.

Alternative form of p.o.'ed