Swistling

Swistling
A sound emitted when one tries to whistle but puts the tongue behind their teeth

A swwwwwwing sound a person makes with their mouth

She was always swistling while happily doing chores

swistle

The sound during certain speech patterns (usually southern) that sounds like a whistle at the beginning of a word.The sound during certain speech patterns (usually southern) that sounds like a whistle at the beginning of a word.

Matthew McConaughey is the king of the swistle!