“Wet” is used in a similar sense to the American “wet blanket.” It describes someone who is dull and basically no fun to be around.
Oh, forgot this one:
Another girl in school (reputation for being loose) was known as “Sodium”.
Na = Nice ass.
After Air Force Basic Training, my tech school was in beautiful Monterey, California, at the Defense Language Institute. This place is a little bit of weirdness carved out of the greater military, and you run into some REALLY interesting people there. (I met and married Lucretia there, but that’s a GOOD thing!)
Anyways, there was one guy that really stood out in his over-arching, soaring, dominant, CHAMPIONSHIP weirdness: Airman First Class Holden.
After one of his legendary displays of the consequences of cross-wiring one’s brain, I dubbed him…
The Wedge, as it is the simplest tool known to Man.
It stuck, and until the day that the Air Force finally figured out that Holden’s recruiter had a nasty mean streak in his twisted sense of humor, and booted Holden out, he was The Wedge.
In certain circles of the intel world, the name still lives in legend and song.
Being yer big, slow movin’ kind, I used to get “Hoss” from my old man. I forgot about it all these years until the other week when my workplace issued ID cards. The form had a place for your real name, and another for a “preferred name”, so I wrote “Hoss” in there. The card looks cool with that on it. 
A nickname you’ll hear in Australia sometimes is “Titzener”, as in “he’s as useless as titzener bull”. Also “Tail light” (a bit dim), and “Avachat” for the talkative types. Then there was the former Premier of New South Wales named Neville Wran. His political opponents liked to call him “Also” as in “Also [W]ran” (though to most of us he was simply “Nifty Nev” due to his devious political methods).
But I won’t go into the nicknames given to the various young men of the Staines family in a town where I used to live. 
This comes from an article in one of the newsletters my company publishes. Apparently this one kid tried out for the basketball team, and even though he was the shortest one trying out, through hard work and perserverance, he made the team! He had proven himself to the coach, to his teammates, and to himself.
Then came the first day of practice. Being high school, only two players showered after practice – him and another guy. He, umm, apparently had the misfortune of having hormones take control while in the shower with but one other guy.
For his entire high school career, he was known as “Stiffy.” Even got yelled out by the whole class when he received his diploma at graduation.
So then he and his younger brother (guilty by association I guess) sued the school district, the principal, the athletic director and the coach for sexual harassment. And won. Granted, there were a few other instances in addition to the nickname, but it still seemed a bit of overkill to me.
That reminds me of what we called this one girl in Jr. High who had… er… developed much earlier than the other girls. I won’t mention her full name, but her last name was “Bresson”. We called her “Breast-on”.