ὑπέρογκοςhypéronkos

bulging over, i.e. (figuratively) insolent

Greek (New Testament) · G5246

Meanings

of excessive weight or size; metaphorically, excessive, immoderate, in late writers, of arrogant speech (see Mayor on Jude 1:16): n. plural, 2 Peter 2:18, Jude 1:16.

Same root

ὑπέρhypér · G5228"over", i.e. (with the genitive case) of place, above, beyond, across, or causal, for the sake of, instead, regarding; with the accusative case superior to, more than
ὄγκοςónkos · G3591a mass (as bending or bulging by its load), i.e. burden (hindrance)

Where it appears

Appears 2 times in the Bible.

2 Peter 2:18 They brag about themselves with empty, foolish boasting. With an appeal to twisted sexual desires, they lure back into sin those who have barely escaped from a lifestyle of deception.
Jude 1:16 These people are grumblers and complainers, living only to satisfy their desires. They brag loudly about themselves, and they flatter others to get what they want.

Source: G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), public domain.