Reverse Dictionary: OBSESSION

ADJECTIVES
M19. ► INSANE idiotic, utterly senseless, irrational, obsessive
M19. ► STUCK obsessed with, devoted to → orig. US
M19. ► STUCK AFTER obsessed with, devoted to → orig. US
M19. ► STUCK ON obsessed with, devoted to → orig. US
1887 ► LOCO crazy, insane, mentally deranged, out of one’s mind; obsessed → Amer. dial.
L19.. ► DEAD SET ON fascinated by, obsessed with, in love with, determined → sl.
L19.. ► IN BITS OVER obsessed with → sl.
L19.. ► WHALES ON obsessed with, devoted to → US sl.
20C.. ► TABANKCA passionate, obsessed → W. Indies sl.
1910 ► GOOFY obsessed; keen on → US sl.
1920 ► PASH passionate, obsessive → sl.
1930 ► PASHED UP sexually obsessed → US sl.
1940 ► QUEER FOR obsessed with, sexually or otherwise → sl.
1950 ► HUNG fascinated or obsessed with → US sl.
1957 ► HUNG UP → HUNG UP ON obsessed → sl.
1990 ► EAT UP keen on, obsessed with → sl.

NOUNS
1845 ► BEE IN ONE’S BONNET an obsession with something
1902 ► BUG an obsessive enthusiasm or craze; an obsession or urge → sl., orig. US
1920 ► RAT an obsession, an eccentricity → sl.
1931 ► WHITE WHALE an objective earnestly and relentlessly pursued; an obsession
1954 ► BUG UP ONE’S ASS an obsessive desire; a stimulus, a goad → Amer. dial.
1992 ► GREAT WHITE WHALE an objective earnestly and relentlessly pursued; an obsession

NOUNS, PERSON
1605 ► BEETLE a crazy, eccentric, or foolish person; a madman, an obsessive fan → sl.
1833 ► CRANK a mentally unstable person; an unreliable, unpredictable person; a person who is obsessed by a single topic or hobby → US sl.
1852 ► LOCO one who is out of his mind or obsessed; a crazy or insane person → Amer. dial., derogatory
1941 ► LOCO BLOSSOM one who is out of his mind or obsessed; a crazy or insane person → Amer. dial., derogatory
1991 ► ANORAK someone obsessively involved with something, as a hobby, that is generally regarded as boring or unfashionable → Brit. sl.
1995 ► TRAINSPOTTER anyone with a pedantic interest in and an obsessive knowledge of a specific topic → UK sl. 
1998 ► MONSTER an obsessive, an addict → sl.

VERBS
1553 ► HAVE BEES IN THE HEAD to be whimsical or obsessed with something →
1887 ► BE LIKE A DOG WITH A BONE to be tenacious, persistent, or obstinate; to be unwilling to yield, relent, or let go; to be unable to set aside a preoccupation or obsession
20C.. ► PUT ONE’S EYE ON to become obsessed with at first sight and thus to desire to possess immediately → W. Indies
M20. ► GO APE-SHIT to be obsessed with a person or thing → US sl.
1970 ► DO ONE’S JOB OVER to become obsessed with → Aust. sl.