Abdominal portrusion (bloating) so much that you resemble that of a floating balloon.
Female (general) cause: That 'time of the month'.
Male (general) cause: Too much donuts and beer.
"Stay clear guys..my mom's a 'Bloaty McFloaty' today".
"If I only knew 20 years ago my hubby would go from 'class jock' to 'Bloaty McFloaty'!"
"Whudup Bloaty McFloaty!"
"Bloaty McFloaty is in the house!"