Nerd Challenge! contest

My friend Autumn (I think, she didn't sign her name) has left a challenge in the comments:

Alrighty Peachums, here's a test of your nerdiness (and GRE-type skills):

Distinguish between: nerd, weirdo, dork, geek, and trypanosome.

Also, please rank them in terms of worst insults to a nerd. Feel free to add terms of your own.

Thank you for participating in this week's Nerd Challenge! contest. We will contact you if you have won our top prize.

OK, here goes:

4. Weirdo. This word, meaning odd or eccentric, is hardly an insult at all. Most nerds pride themselves on being - to say the least - different than your average person. My father, the consummate nerd, is offended when no one calls him a weirdo before lunch.

3. Tie between nerd and geek. It's easy to rationalize these words to mean "having a single minded pursuit." Activities include: sorting mail obsessively (and enjoying it), collecting kitchen gadgets, eating only pasta, doing recreational math problems, and obtaining orgasm during database administration. However, "geek" has an oft-quoted slightly more insulting archaic meaning, "a carnival performer who performs sensationally morbid or disgusting acts, as biting off the head of a live chicken." So tact is of the essence when using this word.

2. Dork. With this insult, you start to fight dirty. The word implies that the person thus insulted has strange clothes and stranger ideas. Nerds hate being called "dorks" because they know it's true. The only possible comeback, "Haha, dontchaknow that 'dork' means 'penis'?!" only heightens the dorkiness of the speaker.

1. Trypanosome. This is the insult's insult, although possibly only among fellow nerds. It's the name of one of several species of parasite found in Africa and South America, where it causes, respectively, sleeping sickness and Chagas disease.

Oh, yeah, here we go. Oooh, baby!

FYI, you get Chagas disease when an assassin bug carrying the trypanosome bites you and then takes a crap in the wound. Chagas disease can cause a problem called megacolon. I trust my readers understand why that is a bad thing.

Feel free to argue and add items in the comments.