* Sardonic: This implies a mocking and cynical tone, often with a touch of bitterness. It's like a wry smile that hides a sharp barb.
* Caustic: This refers to language that is biting and corrosive, like acid. It's more cutting and less humorous than sardonic.
* Acerbic: Similar to caustic, but emphasizing a sharp, tart, and biting quality. This type of wit can be both funny and painful.
* Wry: This suggests a subtle, dry humor that often has a hint of irony. It can be used to make an insult more effective by masking it with humor.
* Cutting: This is a general term for language that is sharp and incisive, intended to wound. It doesn't necessarily imply wit, but it can be combined with it.
Ultimately, the specific term you choose will depend on the specific tone and effect you want to convey.