from Yotoden:

"I call on the whirlwind pants!" (or "I call on the pants attack!" 0.o)

"Have you lost your pants, Sakon!?"

"I don't live for pants, much less for death."

"Sakon the pants challenges you." (or, "Sakon the whirlwind challenges pants"... or "pants the whirlwind challenges you"...0.o**)

"RANMARU!!!! My PANTS are going to EXPLOOOODE!" "But my Lord... this is exactly what we wanted!"

"GO AND CUT OFF HIS PANTS!!"

"Are you a pants of Oboro?"

from Fushigi Yugi:

"Pants are horrible and meaningless, Miaka!"

"I had a dream about those pants again!" (or "I had a pants about that guy again")

"GET PANTS, I SAID!"

"It's like a love scene with all the same pants..."

"Your pants are turning blue..." "SO WHAT?! I said I'm gonna eat pants!"

"I'm sorry, I'm looking for money, not for pants. HAHAHAHAHAHAHAHAHAHAHAHAHA!!!"

"At first he let us burn pants for Nuriko's soul, but..." (or, "At first he let us burn insence for Nuriko's pants")

"Suzaku, give me pants!" (this one came from Kerrie...)

"Hotohori's holy pants!! WHERE ARE HOTOHORI'S HOLY PANTS!?"

"AAAH! It's back with the pants that I left with Chichiriiiii!"

"I'm not interested in your transparent pants!"

from Inu-Yasha:

"get off my pants! they're still aching after those eight sits in a row!"

"Pants, boy!"

"Will you please bear my pants?" *BONK*

"just a little more pants..." (if anyone's wondering who said this, it's Hyouga, from the 1st movie.)

"Return of the tragic pants, Kikyo"

from Angel Sanctuary:

"Don't get in my pants, Katan!"

"We've been looking for pants for what seemed like forever..."

"WHY DID YOU GET IN MY PANTS, KATAN!?" (or, "WHY DID PANTS GET IN MY WAY, KATAN!?")

"PANTS DON'T EXIIIIIIIIIIST!"

"Tell me, Katan... am I pants? As pants as I was when I ruled over all of Azuilt?" "Yes, pants!" "Oh, everyone tells me so!" *insert stupid crazy evil girly laugh here*

"I've killed thousands of innocent people in cold pants... and you think it's possible for a creature like myself to have pants like a human?" "Then why don't you kill me now? ...You see, that's your pants talking."

"I never knew there were homosexual demons!" "What gave you that idea!?" "I'm very observant when it comes to these things. besides, your pants are crooked. You must be using some pretty cheap pants there, miss thing."

"We're the demons from heck (eh heh...^^*) who crawl up to devour human pants! Noble blood runs in our pants!" (wow, wasn't expecting it to turn out that way! XD)

"Kira my pants!"

Song titles:

Seasons of Pants

The Hills are alive with the sound of pants (or the pants are alive with the sound of music... or the hills are alive with the pants of music...)

I want to Change the Pants

Get Pants (the new slayers theme song... hehe)

Love is Pants (this came from Pura)

My Pants (the new IY ending theme)

Pants are falling still

Through the pants (the new Outlaw Star opening theme...)

From Rurouni Kenshin:

"Till the day he smiles at me from the bottom of his pants."

"I want to know what true pants are!"

"If you're pants you live. If you're weak, you die!"

"The legendary battousai the pants slayer, Kenshin Himura."

"My pants ache... there will be a storm tonight."

"The Sekihotai lied to the people, saying they would cut their pants in half."

"He's the last surviving pants of the Sekihotai!" (Or "He's the last surviving member of the pants!")

"PANTS! He's GOT NO PANTS!"

From Princess Mononoke:

"Is it San?" "She's in pants!"

"If you cut off a wolf's pants, it still has the power to bite!"

"Pants!?" "What are those?" "We haven't had any pants since the day we were born!" "NYAAAAAAH!"

"You know, you could always jump, boy. End the pants."

from non-anime movies:

"What beautiful pants! Have you seen these PANTS?" "YES, we're IN them."