| Abbreviation | Definition |
|---|---|
| CEV | Countless Enhanced Viewgraphs |
| CEWL | Cool Even When Lewd |
| CF | Cshtuffing Fenvelopes |
| CFA | Can't Figure Anything |
| CFA | Crazy For Arithmetic |
| CFC | Cook Flying Cars |
| CFC | Cyberian Federal Code |
| CFCZ | Colorado Friends of Cajun and Zydeco |
| CFD | Cow Fluid Dynamics |
| CFHA | Citizens For A Hansony America |
| CFI | Canadian Football for Idiots |
| CFM | Could have Fooled Me |
| CFS | Communist Fascist Shmucks |
| CG | Chalk Guy |
| CGA | Crayon Graphics Adapter |
| CGHN | Congenital Giant Hairy Nevi |
| CGI | Crappy Graphics Interface |
| CGN | Crazy Go Nuts |
| CGP | Crappy Guitar Player |
| CGS | Come Get Some |