What does "bazillion" mean?

An unspecified large number (of).

Bazillion

Common synonyms include: gazillion, jillion, zillion, billion, colloquial numeral, informal numeral.

/bəˈzɪlɪən/ noun, slang

noun, slang ·Moderate ·College level

Noun

1
An unspecified large number (of). excessive, slang
"I second the need for a bazillion dollars. 'twould be nice. :-)"
2
a very large indefinite number (usually hyperbole) wordnet

"I second the need for a bazillion dollars. 'twould be nice. :-)"

1939. Variation of zillion. See -illion.