sour or tart in taste or smell, like vinegar; spoiled or fermented food

Used for emphasis before certain adjectives (especially after 好 hǎo) to mean how or so, as in 好不 hǎo​bù

Suffix used with certain adjectives to indicate a deep degree or a specific physical quality, such as in 酸溜溜 suān​liū​liū or 光溜溜 guāng​liū​liū

(slang) jealous or envious, especially in the context of being "salty" or making cynical comments about others' success

Used for emphasis before certain adjectives (especially after 好 hǎo) to mean how or so, as in 好不 hǎo​bù

Suffix used with certain adjectives to indicate a deep degree or a specific physical quality, such as in 酸溜溜 suān​liū​liū or 光溜溜 guāng​liū​liū