Methionylthreonylthreonylglutaminylarginyltyrosylg...

The word's longest word that means titin

Rich guy: Here is a bet: I will pick a word for you to say and if you say it I'll give you 1m

Crazy guy: Ok, bet
Rich guy: Say this word and record it
Crazy guy: ok

{3.5 hours later}
Crazy guy: I'm done

Rich guy: {listens to it and heares}
Methionylthreonylthreonylglutaminylarginyltyrosylg... ok here is your money bye