How do you use the interjection for snorting? I was told that "snort" is an onomatopoeia, but I disagree. "Haha" and "Heh heh" would be onomatopoeia, because they are pronounced the way they are written. The act of snorting sounds like you are exhaling hair like "Pshht", but "snort" is not an onomatopoeia. That being said, is there a true onomatopoeia, and how would you use it in a dialogue?
"Haha, you're quick on the uptake I take it."
"Snort, you're quick on the uptake I take it."
What would you replace "snort" with?