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フッ軽 fukkaru
Says yes to anything, instantly.
What does fukkaru mean?
Short for フットワークが軽い, light on the feet. The friend who replies I'm on the train three minutes after you float an idea.
Example
彼女はフッ軽だから、急な誘いでも来てくれる。
She's always up for anything, so she'll come even on short notice.
Vibe
Who you can say this to, and how it lands.
Friends only Casual. Natural with friends, out of place at work or with strangers.
The story behind fukkaru
Underneath is a sports cliché: フットワークが軽い, light on the feet, the phrase you would use for a boxer who moves well. Japanese youth speech shears long compounds down to a couple of morae, so footwork surrenders everything but フッ and 軽い keeps only かる.
It became a compliment in the 2020s for a reason. When plans live in group chats, the scarce resource is not free time but willingness — the friend who answers before they have finished overthinking it. The opposite, フッ重, is said with affection and a sigh. Being known as フッ軽 means you get invited first, which is a gift and a scheduling problem at once.
Get fukkaru in your pocket
フッ軽 is one of 308 words in YABAI, a Japanese culture snack for Android. Every word comes with its meaning, an example sentence, a vibe check and a story like the one above — in 13 languages, read aloud by your device. Paid app: no ads, no sign-up, no subscription.
