A language with syntax (or semantics) sufficiently dense and bizarre that any routine of significant size is automatically write-only code. A sobriquet applied occasionally to C and often to APL, though INTERCAL and TECO certainly deserve it more.

In addition suitable contents:
[ = ] [ ag ] [ ai ] [ AL ] [ al ] [ am ] [ an ] [ APL ] [ app ] [ ar ] [ arc ] [ as ] [ at ] [ au ] [ b ] [ bi ] [ br ] [ C ] [ CA ] [ ca ] [ CAL ] [ cc ] [ ch ] [ ci ] [ co ] [ code ] [ de ] [ du ] [ E ] [ ed ] [ ER ] [ er ] [ ERC ] [ es ] [ et ] [ fi ] [ file ] [ ge ] [ gh ] [ gn ] [ gu ] [ h ] [ hat ] [ hr ] [ id ] [ ie ] [ il ] [ in ] [ INTERCAL ] [ io ] [ iq ] [ is ] [ it ] [ la ] [ language ] [ Lex ] [ li ] [ ly ] [ ma ] [ man ] [ mo ] [ mod ] [ module ] [ N ] [ na ] [ ne ] [ ng ] [ ni ] [ nl ] [ ns ] [ NT ] [ O ] [ om ] [ ph ] [ pl ] [ query ] [ rc ] [ re ] [ ro ] [ routine ] [ se ] [ semantics ] [ serve ] [ si ] [ sig ] [ so ] [ su ] [ sy ] [ syntax ] [ T ] [ TECO ] [ th ] [ to ] [ ua ] [ ug ] [ ve ] [ write ] [ write-only code ] [ za ]