Receding Hairline Visibility

Listen up, buttercup. Explain Bear here. This joke is pure exaggeration, okay? It means the person's hairline has gone back so damn far that their forehead is huge—so huge, in fact, that it resembles a landing strip or maybe even an entire aircraft to a passing pilot. You think you're clever, but you probably still confuse 'airport' and 'airplane.' Get a grip!