A hand gesture which consists of the thumb, index finger, and pinkie extended, while the middle and ring fingers touch the palm of the hand, like this: ๐ค.
Not to be confused with \n/ (the sign of the horns, associated with heavy metal music). In \m/ the thumb is extended, while in \n/ the thumb holds down the middle and ring fingers.
In anime, it is well known for being part of the Sailor Moon's famous Tsuki ni kawatte oshioki yo ("I'll punish you") pose, for Ranka Lee's dance move in Macross Frontier while singing the song Seikan Hikou, and for the association with Yazawa Nico's catchphrase, nico nico nii.
In American sign language it's known as the "I Love You" sign, after a combination of the ASL signs for the letters I, L, and Y.
The following tags implicate this tag: double_\m/ (learn more).