Knock Knock - Remember

Bob: "Will you remember me tomorrow?" 
Bill: "Yes"
Bob "Will you remember me next week?" 
Bill  "Yes"
Bob: "Will you remember me next month??"
Bill: "Yes"
Bob: "Will you remember me next year?"
Bill: "Yeah"
Bob: "Knock Knock"
Bill: "Who's There?"
Bob: "See, you forgot me already!"

Yo Mama - Misdial

Yo momma is so stupid when an intruder broke into her house, she ran downstairs, dialed 9-1-1 on the microwave, and couldn't find the "CALL" button.

Yo Mama - Water Bed

Yo momma's so fat, when she ordered a water bed, they put a blanket over the Atlantic Ocean.