Dic: be/get burned

1.
[informal]
a) to be emotionally hurt by someone or something

• Take things slowly this time - you don't want to get burned again.

b) to lose a lot of money

• The company got badly burned in the dot.com collapse.

2.
[cheat]12 [transitive, usually passive] (informal) to cheat or take advantage of someone
[be/get burned]

• A lot of investors were burned by his scams.
• She’s been jilted before and is afraid of getting burned again.

...  LDOCE, OALD