打牙祭

1. • to have a large and sumptuous meal (traditionally on the 1st and 15th of each month)

Character by character

• 打(dǎ)a semantically light, transitive verb that is combined with various grammatical objects to form compound verbs and verb-object phrases with a diverse range of meanings
• 牙(yá)tooth
• 祭(jì)offer a sacrifice to (gods or ancestors)