Heh.

''Heh. Heh heh heh. Heh heh HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAAAAAA''

Used as a response to any accidental innuendo or innuendo-like wording. It's an onomatopoeic notice to the speaker that what they said sounded dirty without being too much of a smartass about it. Has anyone else ever realized how the word "innuendo" sounds like "in your end-oh", which is an innuendo within itself? Heh. is kinda like "that's what she said", but it's more flexible as it can be used in more situations.

Ex. 1
Guy: That guy was nice. I hope he comes again.

Hugo: Heh.

Ex. 2
Guy: Nice race, but you horribly lost.

Hugo: What're you talking about? I was way ahead of you!

Guy: We were neck-and-neck, moron. It doesn't matter what you say because it can't change the fact that I came first.

Hugo: Heh.