An exclamation which may be used to inform someone that they have crossed the line by word or deed, and must therefore be put back in their 'place'. Usually accompanied by a hand gesture reminiscent of talk to the hand, in which the outwards-facing palm is almost in contact with the face of the wrong-doer. A truly successful 'place' is said to have occurred if the miscreant is caught off-balance by the act of putting them in said place.
Temple Robber: I'm totally going to sneak into this temple.
Temple Guard: Place!
Tourist: Might I please have some information about local trains?
Tourist Information Desk: You have to go to the Travel Centre. Place!