I saw this movie back around…96′-99′
The big guy was being fed by a girl and she did it with disgust.
The big guy was trying to catch some kids or some people and he failed so the main bad guy turned him to a massive swollen baby looking thing. So the good guys brought him in and fed him and took care of him.
Maybe:
Weird Science (1985) – http://www.imdb.com/title/tt0090305/