a loving cake=they are loving it up at the M-hotel-->Re:-they (are) livin' it (up at the hotel.) 句中loving cake是蛋糕嗎?另有必要加Up嗎?謝謝?

They (are) loving it
=for the sake of it
=in the name of it;
=be very fond of it
=find pleasure in it
=have deep feelings for it
=have deep feelings towards it
=a form of address between children and Mac-hotel..Re:-send children one's love cake @ Mac.because they are loving it.
"it" means "pronoun",when the food and restaurant are known and important to children
"it" being the grammatical object
=it is happy to eat @Mac. restaurant.