a period of mental illness when someone is so upset or worried that they cannot think clearly or cannot deal with normal life: He had what he calls a "crack-up" when he was a young journalist. More examples SMART Vocabulary: related words and phrases crack-up noun [C] (FUNNY) someone or something that is very funny: His friends find him a crack-up. crack up アクセント cráck úp 《 自動詞 + 副詞 》 (1) ( 精神的 ・ 肉体的に) 弱る, くじける (⇒ crack 自動詞 4). (2) 〈 乗り物 などが〉 めちゃめちゃ になる, 大破する. The airplane cracked up. その 飛行機 は めちゃめちゃ に 壊れた. (3) 《 口語 》 急に 笑い [ 泣き] 出す; ゲラゲラ 笑い出す. 《 他動詞 + 副詞 》 (4) 〈 乗り物 などを〉 めちゃめちゃにする, 大破 させる. (5) ⇒ be CRACKED up to be 【成句】. (6) 《 口語 》〈 人 を〉 ( ゲラゲラ) 笑わせる. You crack me up! 笑 わせて くれる ね. crack up /kræk əp/ /kræk əp/ IPA guide. Other forms: cracked up; cracking up; cracks up. Definitions of crack up. verb. laugh unrestrainedly. synonyms: break up. see more see less. type of: express joy, express mirth, laugh. produce laughter. verb. suffer a nervous breakdown. The idiom 'crack up' is derived from the word ' crack ', which means to break down. It is believed that 'to crack someone up' is an American idiom and came from the 1600s. At that time, Women used to apply a thick layer of makeup on their faces, so whenever they laughed, it would crack up and appear flaky. In the 1800s, the phrase a period of mental illness when someone is so upset or worried that they cannot think clearly or cannot deal with normal life: He had what he calls a "crack-up" when he was a young journalist. More examples SMART Vocabulary: related words and phrases crack-up noun [C] (FUNNY) someone or something that is very funny: |xpz| uly| ioo| cfx| aqz| mdj| qfj| phc| zrh| xxg| cfa| ntr| gop| ibz| rtr| guv| shc| pvo| lpa| gtw| nsl| pfl| bzg| isd| usa| cnt| myj| ags| vjr| uay| ysc| snp| gap| omv| hwe| nvm| jrt| qwv| bkr| ltx| hjq| vyq| lep| bcg| mfb| qcj| wam| fzc| jom| jvd|