be sick

1.  Also, take sick or ill. Become ill, as in It's just my luck to get sick on vacation, or When was she taken ill? [Ninth century]
2.  Become disgusted, as in We got sick as we learned how much money was wasted, or I get sick when I hear about his debts. [Early 1500s] Also see make one sick.
3.  Also, get sick to one's stomach; be sick. Become nauseated, vomit, as in If you eat any more candy you'll get sick, or Sick to her stomach every morning? She must be pregnant. [Early 1600s]

The verb has one meaning:

Meaning #1: eject the contents of the stomach through the mouth
  Synonyms: vomit, vomit up, purge, cast, sick, cat, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up