A wedding proposal that consists of a naked man walking up to a table covered in flour which he proceeds to fart on and blow away, revealing lettering in stuck flour that reads 'Will you marry me?'.
My boyfriendfart-proposed to me yesterday. I said yes! His fart proposal was amazing!
If someone is propositioning you, it means that they are offering you sex. It is a more polite and euphemistic way of saying someone wants to bang you.