A cud thud!
In a mooving van!
A dead cow! (My 5-year old made up this joke)
She heard drinks were on the house.
Neither did he.
Boeing boeing boeing
Cowboom!
They both spit fire
A schoolteacher says "Spit out that toffee" and a train says "Choo choo."
A charmer farmer!
A new moo!