A simple pig nose; pig's have an extraordinary sense of smell - so the pig nose emoji can be used to indicate something that smells great or something that smells off.
The pig nose emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the animals and nature
category. Because the pig nose emoji has been around for quite some time, it should display correctly in the majority of operating systems.