I got twenty bucks... - a way to say you're not interested, but you're really just t

a way to say you're not interested, but you're really just too scared to show you're actually really interested

'I got twenty bucks... I'm not even watching.' (he was the one who started the bet.)

'I got twenty bucks... I'm just here.' (he was hiding behind a wall.)

'I got twenty bucks... I'm not even thinking about it.' (he was already ready to win.)