Combundermine

V. To undermine with combined effort. To combinedly undermine. The use of disparate back-stabbing tactics by unrelated groups that together have the effect of ganging up on one person or thing.

A play on "comb over", a nerdy hairdo.

- The far right and far left distaste for Netanyahu combundermined his efforts at reelection.

- He thought this girl was a sure thing. But her clingy roommate, the sudden rain, and the fact that he threw up on her shoes combundermined his plans to take her home.

- The scientist's hopes at a Nobel Prize were combundermined by breakthroughs in several other fields.