deckhead~
Meaning: Nautical, The under-side of the deck above. Sometimes paneled over to hide the pipework.
Sexual, having the wife / GF doing some wonderful oral / head on a cock while outside on some type of decking~
Example: This camping wife gives her best deckhead even on the grass, so the other campers can see and enjoy it too! She did go all the way deep in while this guy was busy eating~