weigh in
US /weɪ ɪn/
UK /weɪ ɪn/

1.
to join in a discussion or argument with a strong opinion or contribution
:
•
Everyone wanted to weigh in on the new policy.
•
The expert decided to weigh in with his analysis.
2.
to measure the weight of someone or something, especially before a competition
:
•
The boxer had to weigh in before the fight.
•
They will weigh in the fish to determine the winner.