A person who thinks highly of themselves; Arrogant and uneducated, With nothing to back up their decisions or actions.
"Well.. he (she) seemed smart, Untill he started talking. What a Meatwhistle"
a girl ( or the usable portion of said girl) so loose as to create a whistling effect upon motion, much like blowing across the mouth of an empty bottle.
Do you have a clarinet in your pants or is it just your meatwhistle?
"Brought a regular meatwhistle home from the bar last night. had to switch to her ass to feel anything."