The Love-You Gesture combines the American Sign Language handshapes for the letters I, L, and Y. It means I love you, with the thumb, index finger, and little finger extended.
People use it to send affection, family love, encouragement, or warm support without making the message overly sentimental. It is sometimes mistaken for the rock horns emoji, but the extended thumb is the key difference. Some people still use it loosely for rock music or general enthusiasm.
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