cool. i probably don't have the best pronunciation....girls often will often 'correct' me in a teasing manner when i meet them.
i hardly pronouce 'T's. I say them like you would say "aint". It's still there, but it's cut short, the tongue doesn't go to the roof of my mouth. or some words they turn more into a D sound.(water=wahdder, or how lacey says 'sevendees'.) "ing"s turn into "in"s.
Also my sister has teased me throughout my life how I pronounce double O's, or long U's. For some reason I exaggerate those. like, "Lets get some Food."
I also tend to blend words together which confuses people sometimes. It's not that I talk fast, usually, but I turn multiple words into less. For example, "What do you..." and "Can I get some..." turn into "whattuhyoo" and "caneyegetsum", like one whole word.
borrowing the words from the OP:
INTERESTED - innerested.
PAINTING - paint-in(like "aint")
INTERNET - innernet(that t is wierd to explain)
STUPID - stoopid
RETARTED - retardid
DIDNT - did-in. but once again, with that 'silent T' sound.
MIRROR - mear-er. i guess this one is normal.
DRAWER - i say this 'normal' too i guess. droor.
as far as grammar and word placement and all that....My style of talking probly isn't very congruent with how I talk online. Usually I try to be a little more proper online, using bigger words and shit but sometimes my true colors shine through.