Contrary to "Hop on Among Us", "Wanna hop on Among Us" is a slang term, begging for rough sex of any kind. The functioning difference is that "Wanna hop on Among Us" can be used in a heterosexual context and is mostly used by females.
Woman: Hey, Baby. Wanna hop on Among Us with me later? *Secretly wanting to be slammed into the headboard*
Up with Hope, Down with Dope sounds like a positive notion, but when the children grow up and have to face the problems and stresses of life where dumbasses are in unearned positions of power and they try to influence every aspect of our lives then some may lose hope. Then how do they try to cope and meet demands? You guessed it - DOPE!