Names and nicknames Abbreviations and Acronyms
- NMWNot Me, Why?
- NSNicholas Steven
- OBOld Butterpaws
- OHOld Hickory
- OJOld John
- OJOlive Jane
- OJOliver James
- OJOrange Julius
- OJOrrin Judd
- OJOscar Jones
- OJOscar Justin
- OJOrion, Junior
- OJOscar James
- OJOscar Junior
- OJOscar Jesus
- OLBOmaha, Lincoln and Beatrice Railway
- OLVOliver
- OMOther Mother
- OMJOld Man Jenkins (Spongebob Squarepants cartoon character)
- OOTFout of town friend
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