Reference
Definition
What the word means. This is not a work instruction.
Say “hold up” calmly, name the reason, and get verification. Use it for rated walls, unknown material, hidden utilities, blocked access, structure, crane/rigging, or any irreversible move.
Stopping the work for verification is better than explaining damage after it happens.
This term belongs to rated, life-safety, grease, or structural work. Knowing the word is fine. Doing the work is a red-lane call — get direction before you touch it.