Your Blow of Blows
Wikisimpsons - The Simpsons Wiki
Your Blow of Blows was a radio show hosted by Sid Wheezer.
History
Abraham Simpson was once a guest on the show with his whistling talent. In the show, he tried off a special move and ended up hurting himself so he could no longer whistle.
Behind the Laughter
Your Blow of Blows is a reference to Your Show of Shows, a variety show which aired on television in the early 1950s and starred Sid Caesar.