Go through with (it, something)
実行する／予定通りやる／やり遂げる／やり通す/果たす To do something that's personally difficult or challenging. To go through with something usually takes guts, courage. For example, I wanted to ask Ayako out on a date, but I was too nervous and couldn't go through with it.
Have a clue
手がかり/分かる/知る Understand. Do you have any clue as to what I'm saying? 私の言ってることが分かる？(よく否定文書で使われている) I don't have a clue.= 全然分からない、知らない
(have) Got no future
見込みがない／将来性の無い I'm not good at science so I got no future as a scientist.
Hard to come by
手に入れにくい Hard to get, hard to find. These days money is hard to come by.
Hang around
うろつく、つるむ、人と付き合う Don't hang around with bad people or you'll end up in trouble.
Hang out
ぶらつく Let's go hang out in Shibuya this weekend.
Hold it
ちょっと待って！ストップ！ Stop for a second
Hold on
ちょっと待って. Wait for a moment.
Keep in mind
覚えておく (remember) Please keep in mind that you need to use six BTTF idioms in your written speech.
(I'm) history
過去の者だ／やばい! If I get a low score on my test, I'm history. My mom's gonna kill me.
Isn't the end of the world
そんな大げさなことではない／この世の終わりと言う訳じゃないんですよ！It isn't the end of the world if you get a low score on you English test.
It's a wonder
不思議だ／アンビリーバボー／信じられない It's a wonder that Gal Sone can eat so much and not get fat!
Just as I thought
やっぱり／思った通りだ Just as I thought, she's a returnee. That's why her English is so native–like.
Keep it to yourself
私達だけの秘密にする She has a boyfriend, but keep it to yourself. She doesn't want anyone to know.
The last thing you(we, I, he, she, they)need
避けたいこと Something you DON'T need or want 例: The last thing we need on undoukai day is rain.
Make it
来られる，間に合う 1) Can you make it to my party tomorrow? 2) I can't make it to the station by 10:00.