My younger brother is getting so into Arabic poetry and reciting it, his Arabic teacher asked him once to show the other students how poetry should be recited; he went out and recited this:
يا صلعة لابي حفص ممردة
كأن ساحتها مرآة فولاذ
ترن تحت الأكف الواقعات بها
حتى ترن بها أكناف بغداد
Which he memorized from a satirical poetry book he found at home and the guy is basically saying that your bald is like a mirror, and if I touch it the sound would echo all over Baghdad.
The teacher got mad at him; even though I don't think she should have because it's Arabic poetry! My brother went on to tell her that 'it's Bin ElRomi' and to explain it to her the whole story of why he wrote it… she still didn't let him say another one.
I found that he knows more than I do, which is basically nothing. He told me this one too:
يقتر عيسى على نفسه
و ليس بباق و لا خالد
فلو يستطيع لتقتيره
تنفس من منخر واحد
Which is that this guy is saying that the other guy is so cheap and greedy that if he could he would breathe from only one nose. (One side!)