Urban term used in casual conversation. Used much like the word "cracking" in the context of "get cracking" it means to 'get a move on' to 'hurry something along'...
got a few projects that we really need to get cracker-lacking on internally...
When a black man is using a public urinal and peeks over to see what the white guy next to him is working with. This is typically followed by something like a disappointed shake of the head by the black man.
When I go to the club for some cracker mackin' I like to get a little extra confidence by going into the bathroom and seeing some cracker lackin'... then I go steal the poor dude's girl.
When you slightly apply a thick coat of peanut butter around your penis then gently place saltine crackers and spread them over the tip and bottom of your cock sandwiching them and spread jelly lightly on a girls outter pussy lips .
Thrusting your saltine coated cock inside her mashing the saltines as you sing and chant the peanut butter jelly song thrusting at the pace of the song
If you don't have peanut butter you can always substitute with nutella only you have to sing chocolate rain instead .
Ex. Damn Jenny is so bad I would love to crackerjack her and show her some peanut butter jelly time
Me and Paulina were crackerjacking their were crumbs fucking everywhere
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).