ONB - What does onb mean?

ONB has 2 meanings. The most common is "On, bro." See examples of how people use the terms.
Onb is a messaging abbreviation for on, bro that people use to emphasize the truth of a statement or claim (think on my life, bro). For example, if your friend doubts your text about seeing Rhianna at a party, you might respond with, It was her, onb! I'll send you a pic of the back of her head.

ONB OPERA NAZIONALE BALILLA DISTINTIVO ORGANIZZAZIONE GIOVANILE

Aasonn ONB Admin Job Aid

Old National Bancorp (NASD:ONB) Seasonal Chart

Old National Bancorp (NASD:ONB) Seasonal Chart

What does ONB mean? - ONB Definitions

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File:Christus in der Kelter ÖNB Mus Hs 15501 fol 86v.jpg - Wikipedia