Meaning: Be on a committee
Example: She's SAT ON the finance committee from the beginning.
Meaning: To handle somebody firmly who behaves impertinently, conceitedly
Example: If his girlfriend finds out, she'll get mad and SIT ON him.
Meaning: Hold information back or keep it secret
Example: The government have been SITTING ON the report because it was so critical.
We have 15 phrasal verbs with 'SIT'