Thunk
来自Big Physics
wiktionary
By analogy with past tenses and past participles ending in "-unk", such as drunk and sunk.
Onomatopoeic.
Said by the inventors to be from the irregular jocular past tense of think (see Etymology 1), being coined when they realised that the type of an argument in ALGOL 60 could be predetermined at compile time (with a little compile-time “thought”). [1]
etymonline
thunk (n.)
sound of impact, attested from 1952, echoic.
thunk (v.)
dialectal or jocular past tense or past participle of think, by 1876. Not historical, but by analogy of drink/drunk, sink/sunk, etc.