double down

to engage in risky behavior, especially when one is already in a dangerous situation.

This figurative usage as appearing in the Oxford English Dictionary is a meaningful explanation of “double down” other than the ubiquitous “to double the wager in exchange for only one additional card in Blackjack gambit” in every online dictionary.
Don’t try to double down the exposures of your retirement money in aggressive investments

It is the time to double down on the commitment of solar energy, rather than to scale back

HP is going to double down on Palm’s webOS
by vanderpol August 05, 2010
mugGet the double down mug.

live in a glass house

If you live in a glass house, then, it means your are in a vulnerable position that may be easily attacked or rebuked by your opponents
The congressman may live in a glass house when it comes to the ethics issue
by vanderpol August 01, 2010
mugGet the live in a glass house mug.