Nan Slayer 

The ability to get a never ending amount of poon. A gentlemen that exacts an immense amount of female attention

That bro is such a nan slayer! There's always a flood of girls going into his room.

Nan Slayer by nanslayer3.0 January 2, 2011

nayslayer 

One that is capable of completely obliterating someone's doubts or beliefs.

After numerous individuals and organizations voiced their doubts, concerns, and slanderous posts about the prospects of the new business opening up successfully, the nayslayers packed the house so full on opening night a line started forming outside the door.

nayslayer by flashback June 4, 2013

Nayslayer 

Someone who refuses to take no for an answer. The slay every nay (no). An archenemy of the creative michelangeNo.

Stop being such a nayslayer and leave me in peace.

No matter how much John said no, Phil had got nayslaying down to an art. John gave in.

Nayslayer by Logoasaurous September 8, 2021