English · Slang Attested

halo

In real, traceable use. Part of the curated seed collection; community review is coming.

Meaning · English

The anabolic steroid fluoxymesterone, also known as Halotestin.

Where it’s used: Used American English

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “halo” mean?

The anabolic steroid fluoxymesterone, also known as Halotestin.

Is “halo” formal or informal?

halo is generally slang.

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