Lui

When one eats ass.

Person1: Hey man! I heard Whitney pulled a Lui.

Person 2: oh no way, she seems like she would tbh.

Sauce

sauce is a versatile word that can be used as an exclamation, a verb, or even a noun.

As an exclamation it can be used to express excitement, usually happily but also nervously. (See Ex. 1)
It can also be used as an exclamation of victory. (See Ex. 2)
Or as a battle cry or focus-shout while throwing or hitting something, like "HIII-YA".

When in its verb form it has different tenses with different spellings, like any other verb.
(Present) I sauce
(Past/Imperfect) I was saucing
(Past/Perfect) I sauced
(Future) I will sauce
(Future perfect) I will have sauced

As a noun, 'a sauce' is the action of saucing. Sauce can also be a feeling or emotion, usually like an adrenaline rush. (see Ex. 1)

(Ex. 1)
TAL: Aw man it's the last track meet! I'm so pumped! I'm just gonna SAUCE down that track!
FREDDY: Geez I'm nervous. I hope I don't screw this up...
TAL: You just gotta get into the feel of it dude! Just get that SAUCE flowing!
Dude2: Yeah... you're right!

Ex. 2)
The dude from Ex. 1 just won his race,
Dude: SAUCEEEEEEEE!