GIFing out
GIFing out, analogous to a GIF (Graphics Interchange Format), is the act/art of repeating the exact same gesture or movement at least 7 times in a row to expressly elicit laughter.
Michael, don't you dig how Cheryl is totally articulating her son's name by repeatedly acting out the two words "row" (as in 'row' a boat) and "bear" (as in 'grrrr! I'm a bear!') to get across the right way to say his name, Robért? I totally do - you're so right - she's really GIFing out in a hilarious way right now! We are all laughing aren't we!?!