gtfn Share definition Flag Grounded Till Further Notice; When a parent doesn't give an exact amount of time when a child is ground Ted: Hey you still grounded?Chuck: Yeah my mom didn't tell me how long so I'm gtfn gtfn by chocolatebear762 July 13, 2010 0 0 Get merch Get the gtfn mug. Buy Now — $32.95 See more merch
