Wog- 
1. worthy Oriental gentleman. This means a common ordinary
run-of-the-mill garden-variety humaniod.
2. a wog is somebody who isn't even trying.

This was, no doubt, the intended usage for the word in Scientology.
Homer's explanation of the word using the above derivation was even
better. But, somehow this got warped by conceited Scientologists into
meaning anyone who was not a Scientologist.

In the non-Scientology world, I guess the word wog is used as an
offensive term for any foreigner or used to refer to a mild flu or
trivial illness or any kind.

Here's the scoop on the word 'wog' from a the Oxford English
dictionary:

wog

wog1 wo(hook)g. slang. Origin uncertain: often said to be an
acronym, but none of the many suggested etymologies is
satisfactorily supported by the evidence.

1. A vulgarly offensive name for a foreigner, esp. one of Arab
extraction.

   * 1929 F. Bowen Sea Slang 153 Wogs, lower class Babu shipping
     clerks on the Indian coast.

   * 1932 R. J. P. Hewison Essay on Oxford 5 And here the Ethiop
     ranks, the wogs, we spy.

   * 1937 F. Stark Baghdad Sketches 90 When I return, Nasir fixed me
     with real malignity in his little placid eyes. `I knew she
     wanted me to go,' he said. `I could see what she was thinking.
     They call us wogs.'

   * 1942 C. Hollingworth German Just behind Me xiii. 258 King Zog
     Was always considered a bit of a Wog, Until Mussolini quite
     recently Behaved so indecently.

   * 1944 [see come v. 39 e].

   * 1955 E. Waugh Officers & Gentlemen ii. 323 He turned up in
     western Abyssinia leading a group of wogs.

   * 1958 Times Lit. Suppl. 11 Apr. p. vi/3 We have travelled some
     distance from the days when Wogs began at Calais.

   * 1965 [see Commie].

   * 1982 J. Savarin Water Hole i. iv. 42 He hated Arabs... They
     were all wogs to him.

2. The Arabic language.

   * 1977 P. Raymond Matter of Assassination vi. 63, I can't speak
     Wog and don't seems to be getting anywhere.

   * 1982 W. Haggard Mischief-Makers xiv. 157 `I've picked up a few
     words of wog, sir.'.. The driver spoke terrible barrack-room
     Arabic.

3.

a. attrib. passing into adj.

   * A. 1963 J. Lusby in B. James Austral. Short Stories (1963) 236
     Wog chappie scuttling around seeking safe side of the beast.

   * 1970 G. F. Newman Sir, You Bastard viii. 234 We were hawking,
     and getting treated like bleeding wog brush salesmen.

   * 1973 Daily Tel. 31 May 3/2 Judge Sheldon heard that trouble
     started..when white girlfriends of coloured soldiers..were
     taunted by members of the Royal Scots as `wog lovers'.

   * 1977 Drive Sept.-Oct. 112/2 Any foreign car, even a Ferrari or
     a Mercedes, is a wog motor, unless it's a Yank.

b. Comb.

wogland

wogland derog., a foreign country.

   * 1961 [see nig, nig sb.3].

   * 1967 J. Munro Money that Money can't Buy ii. 24, I don't live
     in Wogland [sc. Spain] because I like it.

Hence also

wogger

'wogger;

woggy

'woggy a.

   * 1922 Joyce Ulysses 740 She called him wogger.

   * 1922 Joyce Ulysses 741 She may have noticed her wogger people
     were always going away.

   * 1973 M. Catto Sam Casanova iv. 75, I met some kid in a
     night-club here, does some sort of Woggy belly-dance.

   * 1979 Reese & Flint Trick 13 100 That woggy fellow..was cleaning
     up.

Another meaning entirely: 
wog (C. 1700) M`Alpie Cert. Cur. Poems (1828) 6 ``For we declair it
wnto 
yow, The man hes gott the wog.''
wog (1934) Bulletin (Sydney) 31 Oct. 20/4 ``Buckley's fluke..is a wog 
that enters the nostrils of these snakes during hibernation. ''
wog (1941) C. Barrett Coast of Adventure iii. 51 ``Jolly little 
people..popping into old jam tins a miscellany of wogs-from bull-ants
to 
scorpions and centipedes. ''
wog (1953) A. Upfield Murder must Wait xxi. 191 ``The wogs flying
about 
the light. ''
wog (1964) R. Braddon Year Angry Rabbit i. 9 ``But find the wog, find
the 
super-myxomatosis, the whatever-it-may-be that kills today's rabbits.
''
wog (1976) D. Francis In Frame viii. 126 ``A beastly stomach wog, so
he 
couldn't come.''