hi!
the problem here is not in the meaning but in set expression (there is no to watch up)
to eye up is the phrasal verb and it's meaning is:
to look at someone in a way that shows you are sexually attacted to them
she ................. (watched-eyed)hım up and down?
the answer says 'eyed' ıs the correct one .What ıf 'watched'?
what dıfference ın meanıng occurs ıf we say watched?