Mcmackin rhymes with:
mcmakin, mcmakin, mcmakin, machen, macken, mcmakin, bakken, blacken, bracken, chacon, glacken, hakon, machen, macken, mccracken, mccrackin, mcmakin, slacken
Mcmackin sounds like:
machinegun, magnesium, magnuson, magnussen, magnusson, makinson, mcjunkin, mcmaken, mcmakin, mcmeekin, mcmichen, mechanism, megginson, mignogna, mogensen