In another strip, when Andy asked Jason how it was like golfing with his father, Jason replied that it was "colorful." Andy then asks whether he meant the color of nature, the ball, the clubs, or his dad's orange plad golf pants, Jason elaborated to mean that he was actually refering to Roger's language. Cue Roger swearing.
Lampshaded in another strip, in which Peter stubs his toe and shouts things like "asterisk" and "dollar sign," and then remarks that "comic-strip curse words leave something to be desired." Jason helpfully suggests he add some daggers and lightning bolts. Oh, *$&!
Baby Blues had at least one in the form of "child-safe cuss words".
Daryll: "Dingy-dangy dog-gone heck to phooey!"
In one Bloom County comic, Opus is writing a personals ad for a woman who is seeking "intense physical affection," but doesn't want to sound crude. Opus suggests "snugglebunnies" as an alternative euphemism, and the woman insists that he use "sweaty snugglebunnies" instead.