Oh, you mean hitting j and k in sequence, not an actual chord.
Is there a way to make it trigger when pressing both keys at the same time? I'd rather not have a letter sequence that can kick me out of insert mode, especially when I'm pasting into my terminal.
No; there's absolutely no way for vim (terminal vim at least, but gvim inherits lots of terminal quirks) to see a chord like that.
But, never fear -- if you paste while in paste mode (:h 'paste or :h 'pastetoggle) imaps, iabbrs, etc. do not get activated. If you paste when not in paste mode then things tend to get messed up anyway and those are probably the least of your worries.
Or paste using the clipboard -- "+p in normal mode, or <c-r>+ in insert mode. (The other clipboard is in the asterisk register, but HN keeps eating the character)
:inoremap jk <esc> http://learnvimscriptthehardway.stevelosh.com/chapters/10.ht...