I'm Russian and I don't know the meaning of the word -shout out, I couldn't find it in dictionaries too. Pls someone explain what is that. And almost everybody asks in Instagram "can i have a shout out"
When you post a picture, in the little text box type @ and then what ever their username is for example if their username was bob you would type @bob. Hopefully this was helpful please follow me on Instagram my username is aliplusfriends