Someone who likes to fuck someones pussy or arse after someone else has cum inside them.
Someone who enjoys being sloppy seconds.
He really loved fucking a girl after someone had cum insider her.
He loved cum lube being sloppy seconds provided for his cock.
He was a proper cum fucker!
She gagged on my thick, lumpy cum. She swallowed it, bless her, but she really hates my cumslaw.