-eroo
suffix
- informal English suffix added to a noun or verb to create a playful or humorous variation of the word
Wiktionary
suffix
Etymology: Of unclear origin; perhaps extracted from buckaroo, though this word appears to have been conformed to a preexisting suffix (or word), the stress and final vowel being otherwise unaccounted for.
- Added to certain nouns to form familiar diminutives, normally with jocular or light-hearted intent.
“smack + -eroo → smackeroo”
“I'm feeling peckish … I think I'll have a little snackeroo.”