To eat food raw (without cooking), as with sashimi or fresh vegetables.
刺身は新鮮なら生で食べると美味しい。
Sashimi is delicious when eaten raw if it's fresh.
このイチゴは皮ごと生で食べられる。
You can eat these strawberries raw, including the skin.
肉は安全が確認できないときは生で食べないほうがいい。
You shouldn't eat meat raw if its safety cannot be confirmed.