pull in (one's) horns

Translations
умерить пыл
After the financial loss, he had to pull in his horns and cut down on expenses.
После финансовых потерь ему пришлось умерить пыл и сократить расходы.
Definitions
To reduce one's ambitions, demands, or activities, often due to caution, fear, or a need to be more conservative; to become less aggressive or assertive.
Words
pull

verb
умерить
in

preposition
в
one

pronoun
свой
is

functional word
есть
horns

noun
рога