Similar words: wack, wacky, thwack, back off, pack off, sack out, backout, back on. Meaning: n. a person who is regarded as eccentric or mad.
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(1) That guy's completely wacko.
(2) He was innocent on grounds of being wacko.
(3) Lampley was obviously completely wacko.
(4) Wacko, recently moved to Los Feliz(http://Sentencedict.com), deserves a mention as most unusual store as well.
(5) That wacko talks to himself in a weird language.
(6) That wacko has a huge gun collection.
(7) Elvin: What? You mean to tell me that wacko is 4 in charge now? How?
(8) Soon, the talk-show producer decides she has not found Mr Right but a certifiable wacko.
(9) Are North Koreans nuts? Is their leader a certifiable wacko?
(10) The political problem is how to co-opt the movement's energy and motivational anger without succumbing to its incoherence and being tainted by the wacko voices within it.
(11) But why is Barry Anger returning the spotlight to that wacko?
(12) Elvin: Crazy is too kind .5 Insane is more like it. Nuts! Wacko! Psycho!
More similar words: wack, wacky, thwack, back off, pack off, sack out, backout, back on, back out, back of, tack on, slack off, crack on, blackout, black out, for lack of, go back on, fall back on, back order, on the back of, keep track of, lose track of, crack of doom, turn one's back on, there is a lack of, jack-o-lantern, jack of all trades, be glad to see the back of, escrow account, draw a conclusion.