How do you say 'awesome' in French slang?

Two very current slang words are lourd and stylé. C'est lourd ! and C'est stylé ! both mean 'that's awesome / so cool'. Both are informal and popular with younger speakers.

What does 'c'est lourd' mean in French?

In slang, c'est lourd means 'that's awesome / that's sick', even though lourd literally means 'heavy'. Careful, though: said about a person — il est lourd — it usually means the opposite, 'he's annoying'. Context decides.

What does 'stylé' mean?

Stylé comes from 'style' and means cool, classy or stylish. Il est stylé ton tee-shirt means 'your t-shirt is really cool'. It agrees like an adjective: stylé (m), stylée (f).

Are 'lourd' and 'stylé' rude or formal?

Neither is rude, but both are informal youth slang. They're perfect with friends and on social media, but you wouldn't use them in a formal or professional setting — there you'd say c'est génial or c'est très réussi.

What are other French slang words for 'cool'?

Besides lourd and stylé, you'll hear c'est ouf (crazy/amazing), ça déchire (it rocks), c'est le feu (it's fire), c'est classe (classy) and the classic c'est génial. Each has its own flavour, but all express admiration.

2 French Slang Words for "Awesome": Lourd & Stylé

If the only word you have for "great" is génial, your French is missing the way young people actually talk. In my new video I give you two slang words that mean "it's awesome" — and one of them literally means "heavy". Here's how to use both, with the one trap that could make you say the exact opposite of what you mean.

🎬 "Il est lourd / stylé ton tee-shirt" — two slang words for awesome. Repeat after me.

The two words

lourd — awesome / sick / dope (loor). Literally "heavy", but as slang it means something is impressive. C'est lourd !
stylé — cool / classy / stylish (stee-lay). From style. C'est stylé !

In the video the example is a compliment on a t-shirt: Il est lourd ton tee-shirt and Il est stylé ton tee-shirt— "Your t-shirt is awesome / really cool." Notice the very spoken word order: the compliment first, then ton tee-shirt tacked on at the end.

How to use them

The easiest, safest pattern is with c'est, which never changes:

C'est lourd ! — That's awesome!
C'est trop stylé ! — That's so cool!
Ta vidéo est stylée. — Your video is cool. (stylé agrees: stylée for a feminine noun)

stylé behaves like a normal adjective and agrees: stylé (m), stylée(f), stylés / stylées (plural). lourd as praise is most natural with c'est or about an object, and stays lighter on the agreement.

⚠️ The "lourd" trap

This is the one to remember. lourd means "awesome" about a thing — but about a person, il est lourdusually means the opposite: "he's annoying / heavy-going / a pain." So:

Ce son est lourd ! — This track is awesome! ✅
Il est lourd, lui… — He's such a pain… 😬 (said about a person)

The safe move: use lourd as praise only for things (a song, a video, an outfit), and reach for styléwhen you're complimenting a person or their look.

A few more, for free

Once lourd and stylé feel natural, add these to your admiration toolkit: c'est ouf (crazy/amazing), ça déchire (it rocks), c'est le feu(it's fire), and the safe-everywhere c'est génial.

Try it out

Next time a friend shows you something cool, react in French — Ah, c'est stylé ! For more real, spoken French, see 5 casual French reactions or the expression faire n'importe quoi. And if you want to sound natural in real conversations, I teach one-to-one online — you can book a free 30-minute trial lesson or see how I work as a French tutor in Bangkok & online.