look up any word, like guncle:
 
1.
The act of a man, who is at least slightly spread-legged in a chair or on a bench and is wearing shorts, pulling both balls out one side of his underwear and pulling aside one leg of his shorts, then tricking one of his friends into looking at it.
larry is an asshole. he just showed me his frog brain.
by ihatebuffering January 19, 2011
 
2.
A person whose inability to grasp technical details is imagined to be due to a very small brain.
Those frog brains in customer support had no clue, as usual.
by Huaxacoyotl January 18, 2008