Green’s Dictionary of Slang

cock up v.2

1. (US) vi. to be erect or aroused.

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[US]‘B. Scharde’ Happy makes it big 34: [no text] [Simes:DLSS].

2. (US) vtr. to excite sexually.

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[US]‘B. Scharde’ Happy makes it big 95: ‘[Y]ou’ve got me cocked up too tight to sleep until I get the stiffness worked out of this muscle’ [Simes:DLSS].