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word invented by Jae of DAY6
‘ierno’ means ‘I don’t know

a sibling of ‘ionno’ and ‘donno’
‘eyo Jae, do you know me?’
uhh.. ierno.. clown, maybe?
ierno by shidaiurs May 25, 2021
Related Words
iurno iunno Iuno iuraoka ierno IRNO irunosexual Iuhno Iunoh Iunoo
It is derived from: "I do not know"
It was changed to: "I don't know"
Then: "I Dunno"
Finally: "Iunno"
"When did that happen!?"
"Uh.... Iunno."
iunno by Kavkid June 11, 2006
Iuno is I don't Know, but One word :)
23:33 <Donkie747> What you guys doing
23:34 <Dash`> rofl
23:35 <Donkie747> rofl?
23:36 * Q sets mode: +o Gen|Work
23:36 <Dash`> iuno
Iuno by Ash October 13, 2004
Shorthand version of the phrase, "I don't know." Best read imagining the author shrugging the shoulders and mumbling "iunoh"
Guy1: "what are we doin' tonight?"
Guy2: "iunoh, but imuna get smashed"
Iunoh by NoUse4AName July 11, 2007
Onomatopoetic for "I don't know"
Person 1: What should we eat tonight?
Person 2: Iuno, whatever you want bae.
iuno by Stephen4241 September 3, 2016

Shiii’iunno 

Southern talk meaning: Shit, I don’t know.
Bob-Jim: Hey Jim-Bob, who clogged da shitta?

Jim-Bob: Shiii’iunno, Bob-Jim!
Shiii’iunno by jomama217 August 24, 2011