T’Lyn: Statistically, ensigns serving under recently promoted commanders are more likely to experience death and/or dismemberment.
Boimler: DEATH?
T’Lyn: Yes, and/or dismemberment.

It’s just embarrassing. I’ve been fine for millenia, but now I can’t even control my monsoon seasons.

Vexilon

Boimler: Did we complete the mission?
T’Lyn: Yes. You were the only fatality.
Boimler: [coughs] Yup, feels like it.

Ransom: Promotions are coming up and I think you’ll be very happy.
Boimler: Wait, really? I’m getting a promotion?
Ransom: As long as nothing goes sideways today, you’ll be a Lieutenant Junior Grade.
Boimler: But stuff always goes sideways!
Ransom: Relax. You’d have to screw up in a historically significant way to mess this one up.
Boimler: Okay, yeah, what are the odds of that?

Kayshon: The ship was damaged by cheese?
Ransom: It’s Voyager. Sh*t got freaky.

This ship is outdated and smells like Borg.

T’Lyn

Why is there a room between two holodecks?

Boimler

Rutherford: Wait, I can just ask for stuff I deserve?
Billups: I guess.

Boimler: We put a lot of lightyears on these orange slabs. I promised myself I wouldn’t get emotional.
Tendi: Aw, how could you not? We spent so much time – hanging out, staying up late ranking captains by cuteness, swapping bodies because of those cosmic rays…
Rutherford: [shudder] We learned too much about each other that day.

I’m going to become an insubordination supernova and control my own fate.

Mariner

Female Romulan: Subcommander V’Reck takes pleasure in our misery. Hopefully, he doesn’t get too comfortable for soon my plans will come to fruition and his life will be ‘disrupted.’
Male Romulan: You are betraying Subcommander V’Reck? That is a pity because I am already betraying him and my plans will come to fruition first.
Female Romulan: Please. Don’t make me scoff. Your plans are barely even schemes.
Male Romulan: You wouldn’t know a scheme from a conspiracy!

Mariner: How can you be this distracted over an empty ship?
Boimler: Uh, y’know, Chakotay served here.
Mariner: Dude, this is nothing compared to – y’know – that Pike thing we aren’t supposed to talk about?

Star Trek: Lower Decks Quotes

Boimler: Romulan whiskey is against regulations!
Mariner: Yeah, because it's awesome.

First contact is a delicate, high-stakes operation of diplomacy. One must be ready for anything humanity is interacting with an alien race for the first time. But we don't do that. Our specialty is SECOND contact. Still pretty important. We get all the paperwork signed, make sure we're spelling the name of the planet right, get to know all the good places to eat...

Boimler