To be 'in the mao' means to be in. This could include getting in with a girl or a guy. Additionally, itm can also be used as a synonym for 'sick' or can be used when you do something cool (scoring a goal in soccer).
"bro, he's in the mao with Jennifer"
*scores a basket in basketball* "INNN THE MAO"
"dude are you itm with her?"
"It means in the mao (itm)"
"OHHH yeah dude im itm"
*scores a basket in basketball* "INNN THE MAO"
"dude are you itm with her?"
"It means in the mao (itm)"
"OHHH yeah dude im itm"
by thej-fresh September 1, 2015