Meaning of -O in English

-O

I. (ˌ)ō noun suffix

( -s )

Etymology: perhaps from oh (I)

: one that is or that constitutes or that has the qualities of or that is in some way associated with

boy o

buck o

— chiefly in informal or nonstandard speech; often in place of the missing element in a shortened word

comp o

comb o

— in writing sometimes attached to its base by a hyphen

daddy- o

or sometimes attached to the reduplicated final consonant of its base

kidd o

II. interjection suffix

Etymology: probably from oh (I)

— in interjections formed from other parts of speech

cheeri o

right o

especially imitative words

smack o

bang o

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.