A person who is a total bad ass but keeps it on the down-low to avoid excess attention.
A person who does crazy shit because they want to, not because they think it makes them look cool.
Pronounced on-DRICK, not on-DRICH
Guy #1: Did you hear what Dave did?
Guy #2: Nah man, that guy's always up to the craziest shit but never tells anyone about it!
Guy #1: He's a total fucking Ondrich, man!
Guy #2: Dave is a god...