What tone and formality is SUS?

"SUS" has a casual & expressive tone and is considered informal in digital communication.

Reference ID: sus

Verified Reference Updated: Jan 15, 2025

SUS

Suspicious

Pronunciation: /sus/

Primary Meaning

SUS stands for "Suspicious".

"SUS" stands for "Suspicious". Commonly used in slang contexts and digital communication.

Primary Category Slang

Tone & Register Casual & expressive

Formality Level Informal

First Observed c. 2000s (SMS & Chat Era)

Real-World Chat Example

Alex

He claims he found a brand new iPhone and is selling it for $50...

You

idk that sounds super sus, I definitely would not trust it 😬

How it works here: Here, "SUS" is used as modern slang to describe a claim or situation that feels suspicious, sketchy, or untrustworthy.

Use "SUS" in casual text conversations when warning friends about something questionable or expressing skepticism.

Common Communication Contexts:

Text messages Direct messages (DMs) Group chats

Alternative spellings: sus, SUS