Do we have such expression in English? (I don't remember where I saw it, but I'm sure I did)

Let's head in!

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    Without context I don't see how this can mean anything. At least with "Let's head off!" we can assume the speaker means "...off away from here" even if we've no idea exactly where. But "in" requires at least some credible referent to make any kind of sense at all. – FumbleFingers Reinstate Monica Sep 1 '13 at 16:36
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    Does this not exist in British English? It's extremely common in the US. At the end of a long day at the beach someone might say "Do you want to swim some more?" "No, let's head in." Meaning, "Let's go home." – Greg Hullender Sep 1 '13 at 18:08
  • @Greg: That in itself is a specific context, where in can fairly obviously be seen as contrasting with the fact that we're currently out (on the beach, whatever). The same would apply to up/down if we were currently at an unusually low or high location, but I can't see much point in asking whether Let's head up! is an "expression" in English. – FumbleFingers Reinstate Monica Sep 1 '13 at 19:36

Yes, we use this all the time. Usually it means to go home, but as the other example showed, we sometimes use it to refer to going to some other destination. I think it has a nautical origin. The "heading" of a ship is the direction it is going.

  • I agree about the nautical origin. If you are in a boat, it can mean "Let's head in [toward shore]." – J.R. Sep 1 '13 at 23:51

This is fine. It could be people on the beach wanting to head into the water or people outside a restaurant wanting to head into the restaurant.

  • I disagree, I've never heard "Let's go in" to the water, it's almost always something like: – Stew C Feb 21 '17 at 17:18
  • wait, how do you delete a comment? – Stew C Feb 21 '17 at 17:28
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    Note: It has to be “head into the water” because “head in the water” means to put your head under the surface of the water. The examples here only work if the destination is emphasized, otherwise “in” means home (for a boat that means the shore). The emphasis can be implied. For example, if you already know you will be going inside the restaurant. Summary: Take destination clues from the context. If there is no context, then "in" means home or shore. – Stew C Feb 21 '17 at 17:30