as in,"HACK up the white people into pieces!!! Dirty swine-eating slave-drivers!"
Sun plus a dot, which we'll call, say, a blunt of marijuana, for reasons which shall become clear shortly.
interesting, (in a good way) but also can mean funny (as in, laughing at you!) this deliberate ambiguity being a big thing with Japanese Sarcasm. Although in this case, fully half the time people are being serious.
white people (do the Humpty Hump, they do the humpty hump)