The last modifications of this post were around 2 years ago, some information may be outdated!
Summary
If you don't remember the table name, but remember the column name, use this script to find it.
Code
SELECT c.name AS ColName, t.name AS TableName
FROM sys.columns c
JOIN sys.tables t ON c.object_id = t.object_id
WHERE c.name LIKE '%MyCol%';