Synonym: lunatic, madman, maniac, maniacal. Similar words: megalomania, manifold, manifest, manifesto, manipulate, manifest destiny, zodiac, denial. Meaning: ['meɪnɪæk] 
n. 1. an insane person 2. a person who has an obsession with or excessive enthusiasm for something. adj. wildly disordered.
n. 1. an insane person 2. a person who has an obsession with or excessive enthusiasm for something. adj. wildly disordered. 
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1) A maniac driver sped 35 miles along the wrong side of a motorway at 110 mph.
2) She's a football maniac.
3) That man is a homicidal maniac.
4) My mum is turning into a religious maniac.
5) She was attacked by a maniac.
6) Be careful! That man is driving like a maniac!
7) He had a reputation of being a sex maniac.
8) The woman's a sex maniac if you ask me.
9) He was driving like a maniac .
10) That maniac drives far too fast.
11) A maniac had gouged several holes in the priceless painting.
12) He drove like a maniac. We had one near miss after another.
13) Suddenly this maniac ran out into the middle of the road.
14) Some maniac was running down the street waving a massive metal bar.
15) Even if he is murdered by a homicidal maniac he has chosen to be at a certain place at a certain time.
16) Maniac butchers mum A YOUNG mum was brutally knifed to death just moments after taking her five year-old daughter to school yesterday.
17) You may have buzzed around like a maniac,(http://sentencedict.com/maniac.html) squeezing in as many errands as time and traffic would allow.
18) I looked like a maniac, of course, with my hair all wet, my shoes sopping.
19) He leapt into the car and drove like a maniac to the hospital.
20) He drove wildly, crashing through the gears like a maniac.
21) He leapt into the car and drove off like a maniac, but then she had expected that.
22) I saw you from the doorway scrabbling around like a maniac.
23) As soon as we cast off from the boathouse Dennis started poling downstream like a maniac.
24) The occupant of the stolen car was driving like a maniac.
25) Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin 
26) In a country that by world standards is almost crime-free, some wondered if a maniac was on the loose.
27) Jim had his foot on the floor, swinging around potholes, driving like a maniac.
28) I had to calm down, and not lurch around in traffic like a maniac.
29) I was running around the dance floor like a maniac.
30) As he did so, he frantically searched his mind for something reassuring to say to the maniac in the back.
More similar words: megalomania, manifold, manifest, manifesto, manipulate, manifest destiny, zodiac, denial, biennial, colonial, congenial, millennia, colonialism, augustinian, Palestinian, canine, panic, anima, vanish, organic, animate, animism, Spanish, cranium, moaning, Hispanic, man, many, mechanic, organize.