ADJ.
little
VERB + LOOPY
acting, bit, make, seemed
LOOPY + NOUN
rollercoaster
PREP.
since
ADV.
ever
adj
Having loops.
a loopy rollercoaster
Idiotic; crazy.
Under the influence of alcohol or a narcotic; drunk.
name
A surname.
adjective — informal or slang terms for mentally irregular
Why does catnip make cats loopy?
Tom's been acting a little loopy ever since he started taking that new medicine.
Tom seemed a bit loopy.
i Register
In some senses, loopy is marked as slang. Watch for register when choosing this word.