chuck (something) in (to something)
To place, pack, or throw into a receptacle of some kind, especially hastily and/or haphazardly. My alarm didn't go off on time on the morning of my flight, so I had to just chuck all my clothes into a suitcase and run out the door. The great thing about cooking stews is you don't need a lot of precision—just chop up a bunch of meat and vegetables, and then chuck them all in!