1. Affected with madness or insanity
   - crazy, demented, disturbed, mad, sick, unbalanced, unhinged

See also: insane

Encyclopedia: Brainsick

• jackdaw
• jackeroo
• jacket
• jacket crown
• jacket potato
• jackfruit
• jackfruit tree
• jackhammer
• Jackie Robinson
• jacking off
• jackknife
• jackknife clam
• jackknife-fish
• jacklight
• jackpot
• jackrabbit
• jacks
• jackscrew
• jacksie
• jacksmelt
• jacksnipe
• Jackson
• Jackson Pollock
• Jacksonia
• Jacksonian