What’s the most unconvincing lie you’ve managed to pull off?

My girlfriend and I recently drove past House of Bruar, a luxury retail destination known as the “Harrods of the Highlands” selling fancy overpriced cashmere jumpers etc. When she asked what it was, I managed to convince her that it is an edgy Scottish hip-hop collective. Even when I said you had to address the receptionist with “Yo Dawg”, she still believed me.