May I recommend as a lightweight alternative http://shrug.io which weighs in at a whopping 799 bytes transferred.

I already had this (and a few related ones) set up as a text replacement for macOS and iOS, but I already sent to to a few people that can't seem to figure out how to do that, but like to use "that shruggy guy thing" they see me use.

    dis      ಠ_ಠ
    disshr   ¯\_(ಠ_ಠ)_/¯
    shr      ¯\_(ツ)_/¯