Look a gift horse in the mouth

It's Roman slang: "Noli equi dentes inspicere donati". For example, you can find it in St. Jerome's Commentary on the Epistle to the Ephesians, written in the 5th century.

You look in a horse's mouth to determine its age and/or health. So if someone gives you a horse, and you look in it's mouth, it's like looking for a price tag. It's rude!

Lucius: I bought you this tunic in Thebes for your birthday.
Quintus: Thanks dude. Hey, look, the seam has really cheap thread.
Lucius: Noli equi dentes inspicere donati.
Quintus: Wha?
Lucius: It's Latin. Don't look a gift horse in the mouth.
Quintus. Oh yah, right. Mea culpa.

here's looking at you kid

A famous line from the film "Casablanca" (1942), starring Humphrey Bogart and Ingrid Bergman. Rick Blane (Bogart) says it multiple times throughout the movie to Ilsa Lund (Bergman).

Ilsa: When I said I would never leave you.
Rick: And you never will. But I've got a job to do, too. Where I'm going, you can't follow. What I've got to do, you can't be any part of. Ilsa, I'm no good at being noble, but it doesn't take much to see that the problems of three little people don't amount to a hill of beans in this crazy world. Someday you'll understand that. Now, now... Here's looking at you kid.

Look at all those chickens

(Informal, humourous) a phrase said when many avians are present

N: Look at all those chickens
M: Those are crows, idiot

potato chip looking ass

Someone who looks like a god damn potato chip. There head is curved in and they were the same trash shoes everyday. These kind people say they have yeezys but they really don't. They smell like musty dick and have rusty, dirty braces.

Ex: Look at that potato chip looking ass with his trashy shoes

You look good kitty

I secretly like you

Him:you look good kitty
Her:ew

you are so good looking

An alternative to "God bless you", when someone sneezes. This may result in a break up with somebody, though.

If you want to make a person feel better after they sneeze, you shouldn't say "God bless you". You should say "You are so good looking!"

not as green as you're cabbage looking

Said upon discovering that an individual is not as unintelligent as initially thought. (Chiefly (NW) British Isles, slang, could be construed as complimentary)

"Eee! I thought you were as thick as two short planks, but it turns out you're not as green as you're cabbage looking"