English · Slang Attested 18+

HTFU

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

Both English Tiếng Việt

Meaning · English

Initialism of harden the fuck up.

Nghĩa · Tiếng Việt

harden lên

Machine-translated — suggest a fix

Register: slang

Where it’s used: Used American English

Examples

HTFU means you pull yourself out of a warm bed, suit up and jump on your bike even if the weather is awful.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

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

Common questions

What does “HTFU” mean?

Initialism of harden the fuck up.

Is “HTFU” formal or informal?

HTFU is generally slang.

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