Real Dictionary

salivate
verb: If you say that someone is salivating over something such as the chance to make a lot of money, you are emphasizing that you disapprove of their pleasure or eagerness.
verb: When people or animals salivate, they produce a lot of saliva in their mouth, often as a result of seeing or smelling food.

salivate in American English
to produce an excessive flow of saliva in
to secrete saliva
intransitive verb: to produce saliva
transitive verb: to produce an excessive secretion of saliva in, as by mercurial poisoning

salivate in British English
verb: to secrete saliva, esp an excessive amount