I'm just correcting an Angelism. "You wanna go, Glinda? We'll go." -Cordy, "Orpheus" Glinda is the good witch in "the Wizard of Oz" (aka Willow)
Here's some more -isms:
>"no go": nothing happened -"Bad Eggs"
> "it wasn't something catchy like 'I'm coming out'": the tune isn't catchy - Buffy, "LMPTM" reference to Pink's song
>"haben der big smoochen": have the big smoochies.-"Innocence" this was in the script to describe Cordy and Xander kissing
>"Fire bad. Tree pretty.": what Buffy thinks when her brain isn't functioning on a high level -"GD, Part 2"
> "five by five": okay -Faith & Wes say this
> "clothes fluke": kiss resulting from formal wear -Xander, "Homecoming"
>"dump-o-gram":kiss-off - Cordy, "Revelations"
> "Jones, jonesing" : an urge, need , want, or craving (a BtVS/Ats-ism)
> "a free": study hall
> "the grim" : sullen faces
> "the cryptic": mysterious, secretive behavior, as in,"cut the cryptic, Angel. You're scaring me." - Buffy, "The Prom"
>" Joan Collins 'tude" : bitchy additude -Cordy, "WSWB"
> "going Linda Blair on us": not being yourself -Xander, "Living Conditions"
>"research mode": time to hit the books
> "the ubersuck": major bummer -Buffy, "Inca Mummy Girl"
> "the wacky": crazy stuff -Buffy & Willow, "SAR"
> "the what": obvious problem ("What's the what?')
> "wow potential": possible sparkage -Buffy, "Surprise"
> "yester': passed, over
> "way 007": dressed James-Bond-like (a tux) - "The Prom"
> "shpadoinkle!": an exclamation said when you see something beyond belief -Xander, "The Gift"
>"music of pain": tunes to sulk by -Xander, "Prophecy Girl"
> "otherwhere" or "someplace that's away": elsewhere
>"pathetic much?": feeling sorry for yourself?
> "power-freaked": maxi-wigged
> "messed': out of sorts
> "having 'ors'": considering options
> "geeker joy": nerdy happiness
> "backseat mothering": unsolicited advice from a non-parent -Buffy, "Bad Eggs"
> "boyfriendly": worthy of dating
> "the Zeppo": something or someone useless in the spirit of the forgotten Marx brother
> "If you really are my friend, you better stay away from me. And if you really aren't... (a threat) You BETTER stay away from me." - Willow, "Doublemeat Palace"
>"(a greeting🙂 Hey. (a command🙂 Leave." - Xander, "Prophecy Girl"
>"Gosh, Buf. That's really pathetic." -Angelus, "IOHEFY"
> "I think what my daughter's trying to say is, "Na na na na na na"". - Joyce, "Faith, Hope, & Trick"
>" They say you don't learn anything in high school nowadays, but I've learned to be afraid." -Xander, "Faith, Hope, & Trick"
> "The "na na na na na na" aproach to battle.": taunting to victory - Xander, "Passion"
>"I don't want to be our only hope. Let's have another hope." -Willow, "Becoming, Part 1"
>"That is the guy you wanna party with." -Xander, "Reptile Boy'
That's pretty much all my Buffyisms. I left out the ones mentioned already. I got most of them from the "Buffy Slanguage" at 'www.buffyworld.com'.