sit in for
To substitute; to take somebody's place.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“Can you sit in for me during the meeting?”
“My manager is sick today, so I have to sit in for her at the conference.”
“Since the lead negotiator was delayed by the storm, his deputy had to sit in for him to ensure the contract was signed on time.”
- 01
sit back
To relax, to not exert oneself.
- 02
sit in
To attend a class, educational presentation, meeting, etc. for one time, as a visitor.
- 03
sit in with
To join (often as an observer, supervisor or outsider) a group working together on a task.
- 04
sit on
To block, suppress, restrain (something).
- 05
sit on a tack
An expression of contempt or dismissiveness directed at someone, particularly in the case of disagreement.
- 06
sit on one's ass
To be very lazy and idle, especially when immediate action is required.
- 07
sit on one's hands
To remain idle when action is needed, perhaps because of fear, ignorance, complacency, indecisiveness, or dislike of the person(s) or situation.
- 08
sit on the fence
To remain neutral on a certain topic, to not have a stance or opinion.
Last updated August 10, 2026