look like the cat that ate the canary
1. To appear smug and/or overly pleased with oneself to others, especially over something one has done, received, or accomplished. After her promotion, Janet spent the rest of the day looking like the cat that ate the canary.
2. To have the appearance of guilt but attempt to hide behind an air of smugness or feigned nonchalance. When questioned on the use of campaign funds for his own personal pleasure, the senator looked like the cat that ate the canary.
eat into (something)
1. To take away or use up a large amount of resources over a certain period of time. Changing voter demographics have been eating into the party's traditionally strong hold on state politics. Don't eat into your savings to pay for that fancy new smart phone.
2. To erode, corrode, or slowly consume something. Rising acidity in the ocean has caused it to start eating into the hulls of our ships.
eat (one's) gun
To commit suicide by shooting oneself in the head through the roof of one's mouth. Tom was so overcome with grief after his sister died that he ate his gun shortly thereafter.
eat (one's) own dog food
1. To use the product(s) one's company produces or develops as a means of demonstrating or validating its quality, capabilities, or superiority to other brands. Used primarily in reference to software industries, the phrase is thought to have originated with advertisements for Alpo dog food in the 1980s, in which actor Lorne Green promoted the product by pointing out that he fed it to his own dogs. The company sent out a memo to all of its employees telling them to eat their own dog food to demonstrate their new operating system's speed and ease of use.
2. By extension, to use software one's company is developing—usually in its beta form—so as to test it for flaws and ensure its ease of use by end users before it is released. We didn't have time to eat our own dog food before the new operating system's release, so I'm worried it may still have a lot of glitches that haven't been accounted for yet.
eat (someone's) ass out
1. rude slang To vehemently or furiously scold or reprimand someone, especially in the armed forces. The captain ate my ass out after I came back to the barracks drunk.
2. vulgar slang To sexually stimulate someone's anus with one's mouth.
eat (one's) salt
To stay at someone's house. I feel bad eating Jim's salt for a week, but his house is closer to the meeting site than any hotel.
eat (one's) words
To retract, regret, or feel foolish about what one has previously said. You think I can't get an A in this class, but I'll make you eat your words when we get our report cards! After my negative prediction for the season, I certainly ate my words when the team started out undefeated.
eat pussy
vulgar slang To perform cunnilingus on a woman.
eat (something or someone) for breakfast
To defeat, complete, or handle something easily. Often used as part of a boast. He can challenge me all he wants, I'm not worried! I eat chumps like him for breakfast! If anyone can write a term paper in one night, it's Rich—he eats assignments like that for breakfast!
who ate all the pies
A football chant that targets anyone overweight, especially players and officials. Primarily heard in UK. What a terrible call, fatso! Who ate all the pies? Who ate all the pies?