Queer somebody's pitch/Queer the pitch (for somebody) British informal
Spoil or undermine someone's plans or chances
The storm has queered our pitch as we couldn't reach the peak of the mountain.
My colleague queered my pitch. She copied my report and handed it to the boss first.
The government is working on releasing a proposal that does not queer the pitch for export companies.
To interfere somebosy's plan or bussiness
To spoil something with something else
To do whatever someone asks for
1. To contaminate something with toxic substances.
2. To spoil, damage, or degrade anything positive by the presence or introduction of something awful, sad, or terribly unpleasant.
To spoil or ruin something; to mess something up
The verb "queer" should be conjugated according to its tense.
"Queer" has been used to means "spoil" since the 19th century. This idiom was first recorded in a 19th-century speech in London: “Nanty coming it on a pall, or wid cracking to queer a pitch.”