I'm reading a light novel...

I'm reading a light novel for a manga I love and none of the "sound effects" are translated, so I was wondering if someone could tell me what this sound is:

ズリュズリュ

Google translate says "Zuryuzuryu," but is that a chewing noise?

Thanks.

i don't know and i don't think i want to know

this is a yahoo answers page translated from japanese

Hmmmmmmmm...

That doesn't make any sense, maybe there's an alternate meaning?

Uuuuuuuh I cannot seem to find anything with safe search on so I am Concerned

Fuu.
At last, I defeated it.
With this as my first prey, I feel uneasy about the future.
But, I did it!

I taste it at once!
Munch Munch.
Zuryu Zuryu. ( ズリュズリュ TL note: no idea what sound is this)
Umu, it's bitter and painful.

Is the poison the bitter one?
Is the pain from the ingredient of the acid?
Well, with resistance, I can endure it.
But, it's not delicious.

The above is the context. It's from the light novel "Kumo Desu ga, Nani ka?" or "I am a Spider, so what?"

ok then it's like, slurping but also the sound of something being dragged?????

a google image search of "ズリュズリュ" turns up a bunch of pictures of ramen so yeah probably sounds like sucking