I put laugh in quotes because the thing I'm referring to is less a laugh and more a short burst of sound, for lack of a term I hope answerers can come up with. I'm looking for a word meaning a single wry or mocking “chuckle” that you might hear with the interjection ha or bah. It'll be used in a sentence like this:
" 'You, help me?' he [verbal form of desired word].”
The word must convey a sense of disbelief or contempt; for lack of a better term, you could call it bahing , which would denote the act of making a short sound with the tone of exclaiming “bah!”
If the word doesn't match the definition either very, very closely or exactly, please don't list it as an answer.