From cockney rhyming slang/British origin
Sticking out your tongue is not a raspberry. A raspberry is making a noise by vibrating your lips. Blowing a raspberry comes from the Cockney rhyming slang "raspberry tart" for "fart". Rhyming slang was particularly used in British comedy to refer to things that would be unacceptable to a polite audience.
If you stick your tongue out, you poke it out of your mouth.
lol can mean laugh out loud or lots of love but usually in msn, etc. it means laugh out loud...xd is cross eyed with your tongue trying touching your nose...unlike xp which is just tongue sticking out.
raspberries
Tongue can be a noun, as in the tongue in your mouth. It becomes a verb if you lick your lips with your tongue.
Les framboises are 'the raspberries' in English.
:-p is a sideways face sticking its tongue out at you.
You can probably find her sticking out her tongue in private.
Due to the saliva and temperature which is radiating from the tongue.
Plutckg
your epiglottis
Sticking your tongue out
Santa Cruz
Like sticking out your tongue and having someone jab an icepick through it.
Albert Einstein stuck histongue out because a reporter was trying to take his picture so he tried to ruin the photo by sticking his tongue out!=)
Could be teeth problems or thirst or nausea
the peace sign in this case represent a women's vagina. Sticking your tongue out means you are preforming oral sex on a female partner.
If you stick your tongue out, you poke it out of your mouth.