what dose it mean

"Sean do yr fremmeing essay and stop being a twat"

paraphrased
"yo booom, i got this WOOOOOH i got this booom new idea for lyrics that gonna be rocking these random googlers yall, yo check this shit out yall, boom, you get one throw away lyric, that really isn't fundamental to the song like, booom, yo yo t-t-t-t-t-type it into a few random message boards, BooooM then it be like, yo son, 'fremmme neppa venette', you know whaaaam saying son? they be rocking that irony yall till it gets so boring that it's actually more funny than when the joke originally started, and then yo BOOOM son it be like boom"

word.

what 'dose' it mean.
i thought this one was about heroin or something, instead of fremme neppa venzzzzzzzz