IF your entire surfin’ vocabulary begins and ends with Beach Boys songs, “The Surfin’ary,” will help “nons” (nonsurfers) catch a wave to cool dude-ness.

With 4,000 key surfing definitions, this book takes mere mortals beyond hang 10, wipeout and gnarly (a term Sean Penn’s Jeff Spicoli brought into mainstream-speak). It even has surfing terms for other countries.

Written by native California surfer Trevor “Coconut” Cralle, “The Surfin’ary,” also has a brief history of the sport, useful tips (how to spot a riptide, myths and facts about sharks), surf etiquette and tips on how to use surfish as a second language (Hint: Use one adjective as a complete sentence whenever possible. Examples: Crucial. Random. Critical.)

If you decide to get serious about surfing this summer, here are some key terms:

* Surfing in Nebraska: Used to describe an individual who’s totally vacant. Nothing going on upstairs. Usage: “Bro, I think that dude’s surfing in Nebraska.”

* Hodad: A derogatory term for a non-surfer. See Gremmie. 2) a surfer who rarely goes into the water but still talks, acts and dresses as if he were a minor god of the sport; a fake; a showoff.

* Brodad: Someone who overuses the terms bro, even to the point of calling his mom “bro.”

* Gremmie: An objectionable nonsurfer who hangs around with surfers and tries to act like them in everything but aquatic skill.

* Aqua boot: Vomiting into the ocean.

* Valley sheep: People who say “du-u-u-u-u-de” (spoken like a sheep).

* Sognar: When a dog that’s been playing in the ocean shakes off on you.

* Tube chip: Any tortilla chip that resembles a curling wave.