mam sir 

a female who has male mannerisms; butch female

Wow look at the mam sir, she looks more manly than the average man

mam sir by TD74 March 1, 2011

mamsir 

a pronoun used to address ladies, gentlemen, and variations thereof

Most commonly used in the Philippines where people are either unsure of whether you are a man or a woman, or they just can't be bothered to state the difference.

"Hoy! Pare, isang coke please."
"Yes, mamsir!"

mamsir by velle68 August 17, 2011

Mamsir 

What to address someone whose sex you cannot discern

Excuse me mamsir I did not see you there.

Mamsir by Jagathecat June 1, 2018

mamsir 

a person who's gender you can not identify

Is that a man or women? I don't know, it's a mamsir.

mamsir by some stupid girl February 4, 2010