My late grandfather's two favourite jokes are both pretty bad
A man buys a parrot from a pet store. The parrot is quiet. When the man has guests to his house, the parrot starts cursing a blue streak, ****! ****! ****! *****! ******! Once the guests leave the outraged man warns the parrot if it acts like that again he'll put the parrot in the icebox. The parrot promises to behave next time. Guests come over some time after that and the parrot starts cursing again. When they leave the man pulls the parrot out of the cage and shoves it into the icebox. 30 minutes later he comes back and takes the parrot out, shivering. He puts the parrot back in the cage. After a while the man asks the parrot if it will behave from now on. The parrot promises it will unequivocally but has a question for the man. "What is it?" he asks. "What did the chicken do?" says the parrot.
Three married ladies are waiting for a bus. The lady on the left turns to the lady in the middle and starts on about her lawyer husband. "He drives a Cadillac and he bought us a 6000-sqft house. Every night we have steak and wine for dinner. We have a cottage and a boat and our children get straight-A's in school." "That's nice," replies the lady in the middle. The woman to her right then turns to her and starts on about her doctor husband. "He is the head pediatrician at the biggest hospital in town. He bought me a mink coat and more jewelry than I wear. Twice a year we go to Paris." "That's nice," replies the lady in the middle. "What does your husband do?" ask the two ladies, in unison, of the middle lady. "My husband's a speech therapist. He taught me how to say 'that's nice' when every time I just used to say BULLSHIT!"