a meshuga is like a mamaluka

They are Peacan nuts coated in sugar and cinnamon. Named after the Yiddish word meshuga, meaning "crazy".

Crazy Old Man in Hebrew is "Ish Zaken Meshuga" - איש זקן משוגע.

If you mean the American word "mad", it's zo'em (זועם)

If you mean the British word "mad", it's meshuga (משוגע)

"meh-SHU-gah", originally a Hebrew word, is used in Yiddish as an adjective to mean 'crazy', but in the colloquial sense, certainly not as a formal medical diagnosis. A couple of examples: -- If your friend suggests a plan with which you totally disagree, you might express your disbelief by asking him "What are you ? Meshuga ? ! That'll never work." -- If you are overwhelmed by all the little things you have to take care of today, you might heave a big sigh and exclaim "Oy ! This paperwork is making me meshuga !"