in league with
US /ɪn liɡ wɪð/
UK /ɪn liɡ wɪð/

1.
与...勾结, 与...串通
working together with someone, especially secretly, to achieve something
:
•
The rumors say he was in league with the competition.
谣言说他与竞争对手勾结。
•
She denied being in league with the protesters.
她否认与抗议者勾结。