live by (your) wits

to exist by taking advantage of any opportunity you have.

Kids thrown on the streets with no family to support them have to live by their wits.

• bits and pieces
• bitter fruits
• bitter pill
• bitter pill to swallow
• bit too much
• black and blue
• black and white
• black day
• black mark
• black out
• black out something
• black sheep
• black sheep of the family
• blah, blah, blah
• blank cheque
• blast away
• blast from the past
• blast someone to kingdom come
• blast something to kingdom come
• blast to kingdom come
• blaze a trail
• bleed dry
• bleed for
• bleed for someone
• bleed for something