Freezer was a character and a place that appears in Annoying Orange episode "Chiller". This is where Zombies used to live when they dance.
Grandpa Lemon is telling 'scary stories' to Kid Fruits which involve him 'catching scurvy'. He then tells the story of a freezer opening and turning the fruits into zombies and then the kid fruits are scared by Orange and Pear with fake masks on. The freezer door then opens for real and it laughs in an evil tone.
Orange and Pear are in the freezer and see Marshmallow, Passion Fruit, Grapefruit and Midget Apple as zombies. Pear asks Orange what happened to them, but to his shock, he sees Orange is also zombie (with hair). Orange then rolls back to the other zombie fruits and starts singing Chiller (a parody of Thriller) and at the end the zombies are about to join Pear.
It turns out to be actually a dream sequence as Pear is crying, "Stay back!" and finally wakes up to see Orange. Pear is finally relieved that everything is back to normal. Orange turns zombie, but only pretending to be zombie like other fruits because they have costumes. The freezer laughs again that only be "true" or false.