beat (you) to it

to do something before someone else can.

You had better tell her what happened before someone else beats you to it.

• not be worth the paper it's written on
• not be worth the paper they're printed on
• not be worth the paper they're written on
• not be your bag
• not be your brother's keeper
• not break the bank
• not breathe a word
• not budge an inch
• not by a long shot
• not by any stretch
• not by any stretch of the imagination
• not care a fig
• not care a hoot
• not care a toss
• not care tuppence
• notch below
• notch below someone
• notch below something
• not come up to scratch
• not cup of tea
• not cut it
• not cut the mustard
• not day
• not do any favors
• not do any favours