Go See A Man About A Horse Edit Meaning

1.

Going to the toliet to urinate, in reference to a horses trough so the term only applies to men.

"Yeah sorry lads, have to go see a man about a horse"

See horse, trough

2.

A polite way of saying that you need to take a dump

"Be right back...I gotta go see a man about a horse"

See man, horse, bathroom, toilet, poop