D- "Devil went down to Santa Barbara."

E: Edification

F- Fake (as in detective. But I love him anyway!! Or maybe because of it.)

G- Gus, aka Chocolate Colombo, aka Lavender Gooms, aka Hummingbird Saltalamaccia, aka Ovaltine Jenkins, etc etc etc

H- Henry-style

I- Hi, I'm Ichabod Fletchman....haha still one of my favorite names for himself (Scary Sherry)

J- Joy (Gus' sis )

K: Kkarlton

L...Lassie's awesome gun shooting skills

M- Cloudy McMillon

Got three:
N: Nigel St. Nigel
O: Ovaltine Jenkins
P: PINEAPPLE!!!! (come on you can't tell me you didn't see that one coming!!!!)

Can please just do one letter at a time?

and I don't have one for Q, somebody else can go.

Quit (for all the jobs Shawn had and Quit)

R- Rob-a-Bye Baby

S - Santa Barbara (I know, not wholly original, but I can't recall it being used recently)

T- Talmig Magooliger (sorry, I have no idea how to spell that, lol.)

U- Uncomfortable (what Shawn refuses to feel around Jules)
V- Vernest Lambert Watkins (Gus' nickname as tennis player)
W- White and hairy (what Mira's mom likes in wine and men)

Aren't we supposed to post only one letter and word?

I think that's been said quite a few times now.

X- Xenon flashlights (seriously, there's like nothing else for "X" )

Y- "Why?" - "No, W!" >D

Z- Zippy the Dinosaur, discovered by psychic paleo-sleuth Shawn Spencer

A- Aggiornamento lol everybody knows it was an "i"

B - Bupkis

C- Cheetos ("Every day with the Cheetos...")

D: Dequan "Smallpox" Randolph

E:Edification

F: Felicia Fancybottom

G- Goose (what Shawn's mom calls him)

H: Hummingbird Saltalamacchia

I-Ichabod Fletchman ("Sticky Icky" to my boys, but that's neither here nor there.)

J- Jessica Chan (Gus' girlfriend whom he shared an etermity ring)

K - Kangaroos (or just 'Roos, but that doesn't start with a K, now does it?)

L - Lassiteros

M- Milkshakes & smoothies: huge difference.

N - No Body, No Crime

O: Ovaltine Jenkins!

P - Pizza Chili Cheese Fries

Q- Fries Cuatro Quesos Dos Fritos (seriously, is there anything else that starts with Q?)

Yep, Queen, Quiver, Quotes, Questioning, Quiet, Queer eye guys, Queasy, quarrel, quirky, Dan Quayle, Questionnaires...

R - Rabid Porcupine

S-Silly pants...as is gus "sillypants" jackson

T-Rex, which killed the doctor in 65 millions years off

U - Up as in "Get up in there!"

...shut up.

V- Victoria (Lassie's ex-wife)

W- Water Lillys (I don't remember wich episode, but I remember someone saying it one time, LOL)

X: X marks the spot ("65 Million Years Off")

Y - Yips (one of the most amazing episodes of Psych!)

Z- Zipline. Shawn wanted one from... wait, psych office to Henry's house or the station. i cant remember. but he wanted one didn't he!!

He wanted one in the middle of the Psych office for snacks. A zipline from the office to Henry's house or the station is physically impossible.

Which he got in the end of the ep. ...And it featured a pineapple!

edited to add:

Which should be the next letter.

A - Apple of piney goodness

BANNANA!