pig out 狼吞虎咽; eat up 吃光; eat out 上馆子吃; eat in 在家吃饭; eat like a bird 吃得很少; grab a bite 随便吃几口; I'm full 我吃饱了; be on a diet 节食; overeat 吃得太多; swallow 吞咽; chew 咀嚼; staple food 主食