Someone who is out-standing in his field!
A man who is outstanding in his field.
Where are the udders? (Thanks to my three boys for that one!)
It's how a farmer keeps track of his cows.
With a cowculator.
Antique machinery
He couldn't stand it.
Someone who solves a problem you didn't know you had in a way you don't understand.
It depends on the definition of lightbulb.