if you go somewhere like a bat out of hell, you go very fast.

He ran out of the building like a bat out of hell.

• a woman of means
• a woman of the world
• a word to the wise.
• a word to the wise is sufficient.
• a world of difference
• a worm's eye view
• a yes man
• a zero-sum game
• babe in the woods
• baby blues
• baby boomer
• back and forth
• back away
• back away from
• back away from something
• back-door
• back down
• back-handed compliment
• back in circulation
• backing and filling
• back in the game
• back in the saddle
• back into a corner
• back off
• back out