Bitch has two definitions:
1: A canine (dog) that is female.
2: A really annoying, stupid, rude or mean person.
For definition 1: “Is this dog a bitch or a male?”
For Definition 2: “ That kid is such a bitch!”
Humorous is basically a fancy word for ‘funny’. It means if something is humorous it might make you laugh.
“My dad’s jokes are not humorous at all.”
“When Johnny fell down the stairs it was very humorous.”