"Reasty" is a term that is mostly used in Northern Ireland and Scotland to describe a rancid or spoiled smell or taste, particularly in relation to foods such as meat or dairy products. Some synonyms for "reasty" include "off", "bad", "rotten", "spoiled", "putrid", "rancid", "foul", and "rank". These words convey the same meaning and can be used interchangeably with "reasty" to describe something that has gone beyond its expiration date or has been kept too long under unhygienic conditions. These terms are commonly used in the food industry to describe products that are not suitable for human consumption and should be thrown away immediately.