Seeing vinegar in your dream signifies the earnings you have made honestly and how you are spending them. It may also indicate the proper use of time in your work or longevity. If you see remnants of vinegar, it suggests that you are attentive to your tasks and managing your time wisely. This symbolizes the effective management of various aspects of your life.
From Imam Muhammad Ibn Seerin's Dictionary of Dreams According to Islamic Inner Traditions â entry "Vinegar" (page 461).
In a dream, vinegar means money that is earned and spent in piety with blessings contained therein, or it could mean longevity, or wasting the least time possible in doing one's work. Vinegar sediments in a dream represent ignoble or evil money that carries meager benefi ts, or which is deemed shoddy. In a dream, vinegar and its container represent a servant and her dwellings. Drinking vinegar in a dream means enmity with one's household, or it could mean a family quarrel. As for a prisoner, drinking vinegar in a dream means his release from prison. Good vinegar in a dream means income and blessings, though when rarefied or stale, it means struggling to earn one's livelihood. It also means toiling to make ends meet, or it could mean hardships. Vinegar in a dream also may mean marital problems, difficulties with one's children, or a conflict at work. Vinegar in a dream also represents one's bosom friend. To water one's garden with vinegar in a dream means sleeping with one's mother.
Note: Islamic dream interpretation depends on the dreamer's circumstances and state. This is a general guide drawn directly from the source book.