Same question - it seems to be replacing quite a few different words
I'm pretty sure it has to do with copyright/bootleg talk...I wrote about the boot purple ch*ck and it was replaced with purple galo. Also, I saw it replace the Ch*ck in Ch*ck Britz's name. And every time I see someone say "ch*ck out this website" it replaces "ch*ck" with "galo"