Green’s Dictionary of Slang

ricockulous adj.

also recockulous, redonkulous
[SE ridiculous + ? cock n.5 (2)]

(US black) ludicrous, absurd, worthy of verbal denigration.

Online Sl. Dict. [Internet] ricockulous adj 1. ridiculous, absurd. Note: first used on the radio/TV show ‘Love Line’.
personal correspondence: ricockulous – a more extreme version of the word ‘ridiculous’ Good for when you want to add more emphasis.
[US]C. Eble (ed.) UNC-CH Campus Sl. 2011 9: RECOCKULOUS — ridiculous to an extreme degree: ‘Sara drank so much champagne at the wedding that by the time it was over she looked recockulous.’.
[US]C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 12: REDONKULOUS — ridiculous. Jan. [Internet] And they [i.e. theories] weren’t just false, and they weren’t just ridiculous, they were REDONKULOUS!