Ctfu Definition. The cleft between the cheeks of the buttocks. Jaquon posts a funnygangsta picture on facebook.
On the other hand STFU stands for Shut The Fk Up which is obviously much more aggressive. Used esp in emails text messages etc to indicate amusement. Its understandable to think that this might be an inappropriate acronym considering how the infamous F-word Is in it.
Cruciform Teaching Facilities Unit.
Cut The F Up. Jun 13 2015 ctfu A laughing acronym standing for crack ing the fuck up. The taboo expression cracking the fuck up. Cracking the fk up.
