Used other than figuratively or idiomatically: see and, a, half.
three and a half
(colloquial) An intensifier, used to emphasize great extent or degree.
That guy was an idiot and a half.
Don't sleep too much. If you sleep three hours less each night for a year, you will have an extra month and a half to succeed in. Aristotle Onassis
They treat me like a fox, a cunning fellow (Schlaukopf) of the first rank. But the truth is that with a gentleman I am always a gentleman and a half, and when I have to do with a pirate, I try to be a pirate and a half. Otto von Bismarck
All the material is fictional and develops its own eight and a half private, coelesced journeys, where, perhaps not unexpectedly, the females can run faster than the men and trade their freedoms by exhausting the male sexual fantasies and replacing them by some of their own. Peter Greenaway
I spent five and a half years in prison. The worst part was coming home and finding out Green Acres had been cancelled. What the hell was I fighting for? John McCain
I walked until midnight in the storm, then I went home and took a sauna for an hour and a half. It was all clear. I listened to my heart and saw if there were any signs of my destiny in the sky, and there were none - there were just snowflakes. Pierre Trudeau
To a rogue a rogue and a half. French Proverb