My friend said Nintendo sold a b'spillion games and I said 'what's a b'spillion?' and he said 'I don't know, but it's a lot'

I told my mom about a b'spillion and she said 'you're making that up' and I said 'no, Arlo said it'

My teacher gave me a pop quiz about b'spillion and I got it wrong because I thought it was a real number