When you let out a Greek/Roman fist pump after an exuberant moment.
"Are those black panthers? no, they're just white guys holding their fists up giving gromans"
por The Groman Definer 05 de Maio de 2010
A teenage guy who looks like he is 45 and a father of 4.
Girl: Man that guy looks like my dad, no he's just a gro-man!
por San12345 09 de Março de 2016