Wiktionary:

deep-six | deep-sixed [past tense] | deep-sixing [present participle] | deep-sixes [3rd-person singular present]

Summary:

[United States, idiomatic] to throw something overboard from a ship | [United States, idiomatic] to get rid of something unwanted  (19 of 50 words, 2 senses, 1 etymology)

Link:

http://en.wiktionary.org/wiki/deep-six  [cite]

Merriam-Webster:

deep-six

Summary:

to get rid of; "discard", "eliminate" | slang; to throw overboard  (10 of 31 words, 2 senses, pronunciation)

Link:

http://www.merriam-webster.com/dictionary/deep-six  [cite]

Encarta:

deep-six | deep-sixed [past tense] | deep-sixing [present participle] | deep-sixes [3rd-person singular present]

Summary:

[slang] to dispose of or destroy something  (7 of 30 words)

Link:

http://encarta.msn.com/dictionary 1861688936/definition.html  [cite]

Random House:

throw | threw [past tense] | thrown [past participle] | throwing [present participle] | throwed [nonstandard, past tense]

Summary:

to propel or cast in any way, especially to project or propel from the hand by a sudden forward motion or straightening of the arm and wrist. | to ...  (28 of 1149 words, 56 senses, pronunciation)

Link:

http://dictionary.infoplease.com/throw  [cite]

Wikipedia:

Throwing

Summary:

may refer to: launching a projectile, especially by hand | Throw (grappling), a martial arts and grappling technique that involves off-balancing or lifting an opponent | Throwing (cricket), bowling a delivery in cricket with an elbow flexion degree ...  (36 of 251 words, 18 senses)

Link:

http://en.wikipedia.org/wiki/Throwing  [cite]