IPA: /ˈkræbiɪst/
KK: /ˈkræbiɪst/
The most irritable or grumpy person or thing.
After a long day at work, he was the crabbiest person at the dinner table.
Comparative: crabbier
Superlative: crabbiest
Crabbiest → It is formed from "crabby" (from the dialectal form of "crab" meaning ill-tempered or irritable) and the suffix "-est" (meaning the most). The word "crabbiest" means the most irritable or ill-tempered.
Think of someone who is the 'most' 'ill-tempered' or 'irritable' — that's what crabbiest means.