I don't want to say your mother is fat…

IT'S THE THUNDER ASS

BUTT

HOLY CRAP! you can make a tent with that... not that it's a good idea to.

That's one fat ass!

I think it's just a cowl neck shirt stretched out on the line

Reminds me of a time when my gf and I went into a sex shop for some shopping. Anyhoo.. gf found a 'sexy' short lace top. she tried it on to show me. I burst out laughing. The lace top she had on was actually XXXL large lace crotchless underwear. She had put her head through the crotchless part and yeah...hilarious.