Its a guy (what?!?) thing like Mocking (what?!?) eating out a vagina. Your two fingers are the vagina and you are stiking your tongue in the middle I never seen a girl do this only guys (you're as blind as you are dumb lady!!!).
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That means your tongue is hurting.
Depending on what you mean by "first language", there may be no difference. For most people it implies the language you learned first, which is your mother tongue. But for some it might mean "the language you are most fluent in or use most often" which might not be your mother tongue, if, for example, you emigrated at an early age.
Robotic fingers
fingers
If you stick your tongue out, you poke it out of your mouth.