Amuse
Prank
Gullible
Fool
Hoax
Practical joke
Play a trick (on someone)
Prankster
Crack
Tell a joke
Entertain and make laugh someone
Practical joke
A playful trick that usually puts the receiver in an embarrassing position
Somebody who is used to play practical jokes on people
Play a joke (on someone)
Practical joke
A silly person
Somebody who is easily persuaded to believe something