YOU SAID:

if you drank the poison might as well lick the plate

INTO JAPANESE

毒を飲んだらお皿を舐めたほうがいい

BACK INTO ENGLISH

You should lick the plate after drinking poison

INTO JAPANESE

毒を飲んだ後はお皿をなめるべき

BACK INTO ENGLISH

You should lick the plate after drinking poison