The whole business was starting to have a sour smell to him now.

There was a sour, stale smell in the interview room.

There was a sour smell in the night air, like a broken drain.

"It's too quiet around here and I can't get that sour smell out of my nose."

All of that seemed to hang in the air like a sour smell.

The atmosphere was heavy with the sour smell of human sweat.

It had a sour smell that I tried to ignore.

A warm sour smell was coming from the depths of his apartment.

He was trying to take short breaths to keep from getting too much of the air's sour smell.

She wanted to believe that, but the sour smell of her sweat denied it.