A faint and not unpleasant aroma of beer wafted from him.

In addition, applying expired perfume may lead to an unpleasant aroma or a skin irritation.

Wine that is "corked" has been contaminated by its cork stopper, causing a distinctly unpleasant aroma.

I shrugged -after a dozen years in this far corner of Wicklow this is no longer an unpleasant aroma.