when you're eating so much deliciousanimal flesh that you feel your body being overtaken by a /meat/-gasm.
"i'd like a pepperoni pizza. with sausage. and chicken. and ground beef. and pastrami. do you have venison?"
"mmm ooh this is sooo goood i think i'm gonna have a MEAT-GASM!!!"
A meat whistle is a person who is a big pussy or one who has the potential to be a big soft pussy and who can only be described as a person from wall township.
Some kid falls) That's the biggest meat whistle ever.