1.) Someone or something so sexy that it makes you want to spank the monkey.
2.) An ass so fine that when you see it you want to give it a smack.
3.) A severe bitch-slap beat down.
Wow that porn was spanktastic!
Holy shit that ass is spanktastic!
He got shit-kicked last night it was spanktastic!
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.