Really, I would just stick to a multi or two in a set of lines, where you generally rhyme just one syllable (end rhyme). Like:

You are in the muck, you clearly suck
I am so cool, I drive a truck

You can even do 3 multis in a line, make it a bit longer though because otherwise the flow might get too choppy. There's also comlex rhyming, where you rhyme two words with one or two words. Like:

I'm known for defeating douchebags
And you have less support than Larouche has

The nicest rhyme, I think, is a combination of a multi and two syllable rhyming.

The most important thing is really to learn how to ditch the rhyming dictionary, and worry about vowel sounds, and which letters sound enough alike to rhyme.

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