Half a cat
Because they cantaloupe. (The wife thought of this one... hopefully nobody else has posted it)
1, 2, 3, 95, 98, ME, NT, 2000, XP, Vista, 7, 8, 10.
Half a dog.
A man named Bob running down a train track (only Asians will understand)
Half a dog
Half-a-dog!
There were Poles on the right half of the plane.
Uranium gets to its half-life on time.
Half a cat.