- POSH
- A shot across the bows
- All at sea
- Anchors aweigh
- Another day, another dollar
- Any port in a storm
- Batten down the hatches
- Between the Devil and the deep blue sea
- Broad in the beam
- By and large
- Chock-a-block
- Close quarters
- Cold enough to freeze the balls off a brass monkey
- Copper-bottomed
- Cut and run
- Dead in the water
- Edging forward
- Fathom out
- Flotsam and jetsam
- Full to the gunwales
- Get underway
- Give a wide berth
- Go by the board
- Groggy
- Hand over fist
- Hard and fast
- High and dry
- I see no ships
- In the doldrums
- In the offing
- Keel over
- Know the ropes
- Land-lubber
- Loose cannon
- Mal de mer
- Nail your colours to the mast
- On your beam ends
- Panic stations
- Pipe down
- Plain sailing
- Push the boat out
- Rearranging the deckchairs on the Titanic
- Sailing close to the wind
- Sea change
- Shipshape and Bristol fashion
- Shiver my timbers
- Show a leg
- Slush fund
- Taken aback
- Tell it to the marines
- The bitter end
- The cut of your jib
- Three sheets to the wind
- Tide over
- Touch and go
- Walk the plank
Here’s a list of expressions with documentary evidence to support the claim of an association with the sea:
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