O’Meter

Paddy O’Brien slammed down his mug and let loose a loud belch.
“That be an eight on the burp-o-meter!” he shouted to the rest of the bar.
The bartender tapped Paddy on the shoulder. “That be a four.”
He held up a small device which showed a large red 4 in LEDs.
“Balderdash!” sneered Paddy, pulling out his iPhone and proudly showed the 8 on it.
The bartender took the iPhone, closed the app, and read the icon.
“Fart-o-meter,” he said. “That’s a whole different scale, Paddy.”
Paddy frowned, but brightened up when the bartender filled up his mug again.