- ‘a cup o' coffee’short for of, used to represent an informal pronunciation
- ‘When winter - even our lame-o version of it - lingers, damp and chilly, you may hanker for a cup o' something warm.’
- ‘so if you could sit and have a cup o' coffee and conversation with one member who would it be?’
- ‘It's cold here today, overcast, perfect for a hot cup o'joe.’
In Irish patronymic names such as O'Neill.
Mid 18th century: from Irish ó, ua descendant.