Standard Lemma guide

moonsick

adj · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adj

Meaning 1

Insane or emotionally deranged, either temporarily or permanently.

Definition source: English Wiktionary via Wiktextract

Usage: informal, obsolete

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: deranged, mad, 5150, bananas, barking, barking mad, buggish, buggy, bughouse, barmy, batchy, batpoop, bats, batty, bonkers, bread baskets, cracked, crackers, cra-cra, cray, cray-cray, crazed, crazy, crazy as a bedbug, crazy as a cootie, crazy as a cootie bug, crazy as a pet coon, cuckoo, daffy, daft, demented, distraught, disturbed, doolally, dotty, eccentric, fruit loops, gaga, hatstand, harebrained, insane, kooky, loon, loco, loony, loony tunes, loopy, lunatic, mental, mentally ill, meshigener, meshugge, moonsick, nerts, non compos mentis, nonsane, nucking futs, nut job, nutballs, nut, nuts, nutso, nutty, nutter, off the beam, off the chain, over the edge, potty, psycho, psychoceramic, psychotic, sicko, screwy, squirrelly, starkers, tonto, unbalanced, unsane, wackadoodle, weird, whackjob, whacko, whacky, wode, yampy, zany, apeshit, batcrap, batshit, bat-shit, fucked in the head, fucked up, ripshit

Antonyms: none provided

2

adj

Meaning 2

Affected by or exhibiting an unusual or dreamy sentimentality.

Definition source: English Wiktionary via Wiktextract

Usage: informal, uncommon

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From moon + sick.