To make a wet, sucking sound, like when you step in mud.
Squelched can make people think of wetness, mud, or walking in the rain.
Examples:
I squelched in the mud.
The wet ground squelched under my feet.
She squelched through the puddles.
The squelching sound was very loud.
When I stepped in the mud, it squelched so much!
The squelching noise was funny and made everyone laugh.