Does a fat person matters the singing? Heard they lack of breathing to hold up a note.?

Tell that to people in opera. Many a diva was overweight. What about Aretha Franklin? How about Queen Latifah?

Your body size has nothing to do with whether or not you can sing.

No, being overweight won't affect your singing negatively or positively, in terms of breathing. One of the best male singers I know personally is overweight and can sustain notes and pitches as well as (and better than, in some cases) anyone else.

What about Pavarrotti? He was fat and a great opera singer.

No no no!!! Absolutely not true!!
My friend is fat and he's a great singer. I'm fat and I can sing so well! Hahaha no, weight doesn't matter. All that matters is passion! Voice! But also some technique. You cant just start singing without even knowing how to breathe, coz if u dont breathe right u will get tired soon and your throat will hurt.

no t manly depends on how good of breath support you have