Jeff is an orange Muppet whatnot made in FAO with glasses containing eyes. He is also found on Facebook with the profile name "jeff.whatnot".
Born April 19th, 2010, Jeff is the older brother of Lydia Whatnot, by 20 minutes (although she may argue that point).
Contrary to popular belief, Jeff was not in the recent 2011 Muppet Movie. When asked about this, Jeff stated "Don't I wish I were on set!"
Some of his friends are Baxter Buff, Marvin Whatnot, and Jake the Puppet.