Chifir (Russian: чифи́рь, romanized: čifir', or alternatively, чифи́р (čifir)) is an exceptionally strong tea, associated with and brewed in Soviet and post-Soviet detention facilities such as gulags and prisons.

Some sources mention properties of a light drug, causing addiction.

The etymology is uncertain but is thought to come from the word chikhir' (чихирь) meaning a strong Caucasian wine, or a Siberian word for wine that has gone off and become sour and acidic.^[1]

Chifir is typically prepared with 5–8 tablespoons (50–100 ml) of loose tea (or tea bags) per person poured on top of the boiled water. ^{[citation needed]} It is brewed without stirring – at least until the leaves drop to the bottom of the cup.^{[citation needed]} During the brewing process, the leaves start to release adenine and guanine into the water, which does not happen during traditional tea-making.^{[citation needed]} Sugar is sometimes added; the nature of the brew tends to result in a bitter flavor.^[2]

It is to be carefully sipped, otherwise it may cause vomiting.^{[citation needed]} Ultimately, making chifir involves brewing a great deal of black tea and for a long time. It may be left to brew overnight and drunk either hot or cold.

• Irina Ratushinskaya describes the brewing of narcotically strong chifir as a banned activity sometimes undertaken by prisoners, in her memoir of her years as a political prisoner, Grey Is The Colour Of Hope.
• In the Gabriele Salvatores-directed film Deadly Code, the character played by John Malkovich prepares and describes chifir to the young Kolyma.

• Sa'idi tea, a somewhat similar beverage (essentially a weaker grade, but consumed in larger quantities) drunk in Upper Egypt and among Sa'idi people elsewhere
• Zavarka, concentrated tea used in brewing tea from a Samovar