Toxic Share definition Flag Toxic is a person or group who are very close minded and cannot see there is a version of clarity and hope in a different/difficult lifestyle. why do my friends not like you because we have both had problems in the past. That's toxic! Toxic by Young Wisco๐ฒโ๏ธ๐๐๐ป๐ฎ๐ปโโ๏ธ๐ฒ๐ฒ๐ฒ May 29, 2018 Get the Toxic mug.