eatin is cheatin
When you give or get a blowjob from someone who's not your significant other, and you're completely dumb for thinking it doesn't count as cheating.
My brother got caught eatin' and said, 'It's not cheating, it's just a snack.'
My neighbor told me, 'Eatin' is cheatin', and you're eatin' like a pig.'
My ex said, 'You were eatin', I was cheatin', and you're still a total waste of breath.'