I think you might be thinking of squelch or a "wet sucking sound". If you fell into a swimming pool fully dressed, your shoes would squelch as you walked.

I remember it by thinking of squish (wet noise) + belch (air noise or burp).

I think you might be thinking of squelch or a "wet sucking sound". If you fell into a swimming pool fully dressed, your shoes would squelch as you walked after you got out of the pool.

I remember it by thinking of squish (wet noise) + belch (air noise or burp). There are some examples of squelching noises, including "A sword slicing a human, gory" sample, on this SoundSnap page.