sure as God made little (green) apples (alsosure as Christ made green apples, …little apples, sure as God made (sour) apples, …daisies, sure as God put worms in sour apples, sure as Jehovah made little green apples)
[late 19C+] (UK/US) definitely, for sure.
sure as hell (alsosure as heck, …heaven’s happy, …hell’s hell, …hell’s hot, sure hell, sure in hell, sure to hell)
[20C+] without a doubt, certainly.
sure as hogs are made of bacon (alsosure as beans is beans, ...eggs ain’t chickens, ...eggs (is eggs), ...mutton’s mutton, true as eggs is bacon)
sure as shit (alsosure as cowflops, ...shit and taxes, ...shite on your shoe, ...shit runs downhill from a privy, …shit stinks, surer than shit) [shit n. (1a)/shite n. (1)]
[1950s+] certainly; definitely.
[1970s+] (US) used as an affirmation.
sure as shooting (alsosure as pop)
[mid-19C+] (US) definitely, for sure.
sure as shucks
[1900s-60s] (US) for certain.
sure as the devil’s in London (alsosure as a devil in London)
[mid-19C] (UK Und.) without doubt.
sure as there’s shit in a goat
[1970s+] without any doubt, certainly.
sure as there’s meat in mutton
[1900s] (Irish) certainly, undoubtedly.
sure as twopence
sure as you’re a foot high (alsosure as I’m a foot high, ...I’m a man fit to wear britches, ...the day is long, ...you live, ...you’re alive, ...you’re born)