Meaning of -EROO in English

-EROO

a suffix that creates familiar, usually jocular variations of semantically more neutral nouns; normally added to monosyllabic bases, or merged with bases ending in -er: flopperoo; smackeroo; switcheroo.

[ of unclear orig.; perh. extracted from BUCKAROO, though this word appears to have been conformed to a preexisting suffix (or word), the stress and final tense vowel being otherwise unaccounted for ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .