float tank
/floʊt tæŋk/
UncommonA dark, soundproof pod filled with saltwater you float in for sensory isolation.
Sometimes called flotation therapy or sensory deprivation tank. The wellness crowd uses 'float tank' casually; 'sensory deprivation tank' sounds more clinical or experimental.
Real-world examples4 examples
| # | Example | What it means | Source |
|---|---|---|---|
| 01 | Did a float tank session after the marathon. Legs feel human again. | Used floating for physical recovery after intense exercise. | instagram, 2024 |
| 02 | Float tank was the most boring and somehow the best thing I've done in months. | The absence of stimulation was unexpectedly restorative. | x, 2024 |
| 03 | My friend keeps telling me to try a float tank and I keep saying absolutely not. | The idea of sensory isolation sounds unappealing or claustrophobic. | reddit, 2023 |
| 04 | Two hours in a float tank and I came out a completely different person. | The experience was mentally resetting in a significant way. | tiktok, 2024 |
Use it when
- Describing the experience of floating in a sensory deprivation tank.
- Talking about booking or recommending a float session.
- Discussing biohacking, recovery, or unconventional wellness practices.
Do not use it when
- You mean a regular swimming pool or bath.
Variations and related forms
Float tank vs sensory deprivation
float tank
Float tank is the casual wellness framing, emphasizing the floating and relaxation.
VS
sensory-deprivation
Sensory deprivation is the clinical or experimental framing, emphasizing the removal of all sensory input.
Origin and context
Flotation tanks were developed in the 1950s by neuroscientist John Lilly for consciousness research. Commercial float centers expanded in the 1980s and again in the 2010s as part of the biohacking and wellness trend.
- First seen
- 1950s
- Confidence
- high
Cite this page
Use this stable URL to reference the entry.
https://slang.fyi/float-tankUpdated: 2026-08-28License: CC BY 4.0