Rodd learns what gay means

Listen up, buttercup! So, Rodd asks Bart what "gay" means, right? Bart, being the rascal he is, tells him it means you used to be scared but now you ain't. Then, Rodd tells his super religious dad, Ned, that he's gay. The joke is that Rodd uses Bart's definition which is completely wrong and misses the true meaning of the word, leading to a funny misunderstanding with his dad. You probably still don't understand it because you are still using internet explorer.