Appearance
Form, Look
noun, の adjective
Someone has the status of being liked by you, and it's because of their incredible appearance and form. They have a great look, and it's really making you like them (you're kind of superficial).
On its own, 格好 usually refers to how someone comes across visually, especially their clothing or outward style. But in set phrases, it can also describe something's overall vibe, which is why 格好いい works for a good-looking person, a jammin' song, or even a line of dialogue that just sounds effortlessly cool.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Just be sure to note the かく reading, which gets changed to かっ.
Note that in casual speech, people often shorten 格好's reading from かっこう to かっこ. This is especially common with the phrases 格好いい and 格好悪い, which tend to be shortened to かっこいい and かっこわるい — and even written that way in kana sometimes. BUT… when it's time for kanji exams, remember to use the official reading かっこう for 格好!
格好が悪い
looking unfashionable, doing something embarrassing
格好が良い
looking stylish, doing something impressive
格好がつく
to look presentable, to look the part
格好がダサい
outfit is unfashionable, looking lame
格好をつける
to try to look good to impress others, to try to act cool
格好を気にする
to be concerned with one's appearance
格好を見る
to look at someone's appearance
ステキな格好だね。
That's a lovely outfit.
格好いい車ですね。
That's a cool car.
いや、その格好はダサいよ。
Nah, that outfit is lame.
格好悪いことしちゃったな。
Well, I sure made a fool of myself.