4x100

4x100 (สี่คูณร้อย)
A colloquial Thai term for a psychoactive beverage made by mixing kratom tea (Migranyan speciosa leaf decoction) with sweetened soft drinks and most commonly diphenhydramine (Benadryl)–based antihistamine syrup or tablets. The name “4x100” comes from the idea of four ingredients combined in 100 millilitres of liquid. Although other additives (such as codeine cough syrup or tramadol) may sometimes be included, diphenhydramine is the primary and most typical additive due to its wide availability and strong sedative effects. The drink produces a combination of stimulant and sedative properties but carries significant health risks.
“He’s been sipping 4x100 all night, no wonder he’s nodding out.”
by RealCulture August 25, 2025
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KT

A common shorthand for kratom (from Mitragyna speciosa), a tropical tree native to Southeast Asia. In Thai slang, KT usually refers to kratom tea (namtom) or powdered kratom, used for its stimulant or relaxing effects depending on dose. People say KT when they want to keep it short, casual, or low-key — kind of like calling cannabis “weed.”
“Yo, you got some KT for tonight?”
“Let’s brew up some KT before work.”
by RealCulture August 25, 2025
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Thai Lean

A slang term for Thailand’s street version of “lean.” Unlike the American version that mixes codeine cough syrup with soda and candy, Thai Lean is almost always just kratom tea (namtom) combined with diphenhydramine (Benadryl) syrup or crushed tablets, sometimes with tramadol or other cheap medicines. While soda might be added occasionally to mask the bitterness The effect is a heavy, sedating high layered over kratom’s stimulant base, but it’s unpredictable and carries significant health risks.
Most dudes round here just drink Thai Lean without any soda, it hits harder that way.
by RealCulture August 25, 2025
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Namtom

Namtom (น้ำต้ม)
In Thai, it literally means “boiled water,” but in street slang across Thailand (especially the south and central regions) it refers to kratom tea. Namtom is made by boiling fresh or dried kratom (Migranyan speciosa) leaves into a dark, bitter liquid that people drink for energy, focus, or relaxation. It’s the most common way kratom is consumed in Thailand, often served in plastic bottles in e with ice at roadside stalls, used socially like coffee, or mixed with soda to soften the taste.
Someone might say “ไปกินน้ำต้มกันไหม” (“Wanna go drink some namtom?”)
by RealCulture August 25, 2025
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KT

A modern shorthand for kratom, the tropical tree (Mitragyna speciosa) native to Southeast Asia, especially Thailand, Malaysia, and Indonesia. The leaves have been chewed or brewed into tea (namtom) for centuries as a natural stimulant or pain reliever.

The slang “KT” developed in Thailand as a quick, low-key way of referring to kratom in text messages, online chats, and street talk. It’s basically the English initials of kra-tom (the Thai word กระท่อม, pronounced gra-tôm), shortened to just “K” and “T.” The abbreviation caught on among younger users and spread through forums, music, and social media where people wanted a simple, coded way to talk about kratom without spelling it out.
by RealCulture August 25, 2025
mugGet the KTmug.