Going off your revised dialogue.
Jackie: uhuu!!!
This is a little sudden. I think if you introduce in the prose the fact that Jackie is drunk and making a cheering or whooping sound, this line is unecessary. It could just be a me thing, but I'm not too big on sfx in dialogues.
Kamso: please, stop piloting!!
I'd go with something more exciting, like, "Jackie, I'm begging you! Get your hands off the stick!" Stick as in joystick, flight stick.
Jackie: naaah
This is fine. Maybe less 'a's though. "Nah... everythin's absolutely A-OK" Is what I'd do. Add a little more dialogue in because he's drunk and talking nonsense, you know?
kamso: oh god! Why are you like this?!
I think it'd be funnier if Kamso talks to Yuki here, turning to Yuki and saying, "God... why is he like this?"
yuki: Jackie was droped on the head as a baby
"I still think he was dropped on his head as a baby." would fit with that
jackie: shu'úp knee-high-
Maybe to clarify, "Shu'up, you knee-high—"
yuki: I'll turn ya eyeballs upsidown!!
I think to contrast Jackie's drunkenness, try to make the others sound less drunk. "I'll turn your eyeballs upside-down!" Although I also have no idea what kind of threat this is, it's so absurd that I don't find it urgent. I would change it to something more space-pilot-y, like 'I'll eject you right into orbit! Then we'll see if you can play basketball with meteorites!" This is then both a threat and a jab at Jackie's height.
jackie: if you can reach them, microbe!!
Microbes are small, not short, so I'd go with something else. And a continuation from my proposal could be something like, "At least I'd be able to reach them!"
kamso: come on, guys don't fight.
I feel like "Come on, guys... not again..." would be funnier, if Yuki's height is a sore spot.
In essence, this is what I'd do:
Kamso: Jackie, I'm begging you! Take your hands off the stick!
Jackie: Nah, everythin's A-OK!
Kamso: God... why is he like this?
Yuki: I still think he was dropped on his head as a baby.
Jackie: Shu'up, you knee-high—
Yuki: I'll eject you right into orbit! See if you can play basketball with meteorites!
Jackie: At least I'd reach 'em!
Kamso: Come on, guys... not again...