A very large amount, i.e. untold billions.
I told Greg that Jaycee had slept with a kabillion people, but he hooked up with her anyway and got chlamydia.
ayon kay roahboah ika-06 ng Oktubre, 2003
1 more definition
Millions upon millions.
That missile must have cost a kabillion dollars
ayon kay Nobuyuki ika-03 ng Oktubre, 2003