Does "we couldn't fit in" mean "we couldn't go along with"?
Background info:
"We wanted to write another couple of verses. But we couldn't find rhymes for fat and ugly — we wanted to sing about
his mother, see…
we couldn't fit in useless loser either — for
his father, you know… But you like the
Weasleys, don't you, Potter? Spend holidays there and everything, don't you? Can't see how you stand the stink, but I suppose when you've been dragged up by
Muggles, even the Weasley's
hovel smells okay… Or perhaps, you can remember what your
mother's house stank like, Potter, and Weasley's pigsty reminds you of it —"—
Draco Malfoy taunts
Harry Potter about the Slytherins' song
[src