Roundhead

The roundhead screw and its fraternal twins, the button head and pan head screws, have a head that is flat on the bottom and hemispherical on top.

You can use flat-head screws and plug the holes, or you can use roundhead blue screws and let the heads project.

You roundhead whore, sock it up, or me will kill you, begar.

Colonel Middleton was dismounted amongst the king's forces, of whom one, taking him for a commander of their's, mounted him again, and bid him make haste, and kill a roundhead ; and so he escaped.

The parliament, which either could not or would not be prorogued till the end of October, busied itself exceedingly regarding the queen's residence with her children, and testified the utmost jealousy of her confessor, father Phillipss, who underwent several examinations; and may portentous hints were dropped by the roundhead orators in the house of commons respecting the queen's establishment of Capuchins at Somerset-house.

He added that they 'fell upon all that have short hair' and cried out, 'A roundhead! A roundhead!'

That’s a good reminder of how they won the referendum: these cavalier romancers trounced the roundhead number-cruncher remainers. Surely the country wouldn’t be fooled by the same trick twice.

The roundheads in the school showers easily equalled the cavaliers.

Since penile preference is so tied up with personal aesthetics and body image, it seems both logical and fair to leave the choice of cavalier or roundhead to the owner of the organ, thus avoiding the sort of life-long pain expressed in a comment like this:[…]

I knew about the English Civil War, Cavaliers (wrong but romantic) versus Roundheads (right but repulsive), but I didn't think that was what he was talking about. I shook my head. “It means our willies aren't circumcised,” he explained. “Are you a cavalier or a roundhead?”