Where does “dickslap” come from?

dickslap (English) comes from English Dick, from English declaration, from Middle English declaration, from Old French declaration, from Latin declaratio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

dickslap (English): An objectionable person; The act of slapping...

Definitions

An objectionable person; The act of slapping...

Ancestry of “dickslap”, step by step

dickslap traces back through two separate lines of ancestry.

via English Dick

Step	Language	Word	Meaning
1	English	Dick	A male person
2	English	declaration	A written or oral indication of a fact, opinion,...
3	Middle English	declaration	—
4	Old French	declaration	—
5	Latin	declaratio	The act of making clear; a disclosure,...
6	Latin	-tiō	tion, -ation, -ing
7	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
8	Latin	dissertus	arranged, disposed; explained
9	Latin	disserere	second-person singular future passive indicative...
10	Latin	dis-	asunder, apart, in two; reversal, removal;...
11	Latin	calceus	shoe
12	Latin	calx	limestone; chalk; the finish line
13	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via English slap

Step	Language	Word	Meaning
1	English	slap	A blow, especially one given with the open hand,...
2	Middle English	slappen	—

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →