Although his peers and ladyfriends know him by the less rigid and more socially acceptable name of Henry, Harold still uses his official name for more formal affairs, such as passports applications and membership to the country club.
I've been farting non-stop since I got up this morning, I think I've definitely got a case of the Bad Guts coming on.
or,
Johnny had a case of Bad Guts, and proceeded to lose the Poop Fart Gamble.