He kicked a guy in the chin in Superman: The Wedding Album... he was de-powered at that point though. Aside from that, sorry, not a big Superman reader.
Eh don't worry about it. It's not like I owe a bunch of money to the mob and the only way to avoid getting shot is to make a ridiculous bet on whether or not Superman ever kicked a villain in comic books with my friend Monty. Besides, Monty's probably wrong anyhow, so I'll get the five grand any day now and I won't lose any more fingers.
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Humans are afraid of the dark.
And yet… At the same time, we’re fascinated and bewitched by it.
Maybe that’s why humans drink the darkness that is coffee.
I think he's kinda pushed himself clear/sent an opponent stumbling back with his legs, but a straight up kick? Eh, there's probably at least one example out there, but I haven't seen it.
Bingo! He did kick Doomsday in The Death of Superman. He did so at least three times: twice by effectively flying down at him feet first, and once near the end he does a straight kick, breaking off the pointy bone on Doomsday's left knee.