不管三七二十一

1. • regardless of the consequences
2. • recklessly relying on a hopelessly optimistic forecast

Character by character

• 不(bù)no
• 管(guǎn)surname Guan
• 三(sān)surname San
• 七(qī)seven
• 二(èr)two
• 十(shí)ten
• 一(yī)one