A high pitch noise; ie, screech, shrill, scream. Generally associated with bestial sounds and eletronic noises, such as oscillating pitch shift, (saw), animalistic high pitch muling/bugleing, or guttural or fry screaming
most likely an anglicization of swedish word skräll; bang, crash, bray, clap
admittedly it could be from skrillex, and skrill
maybe associated with skrillexs early
dubstep sound, both the high pitch whiny saws, oscillations,
sub growling and screeching sounds.