Singing out loud while listening to music with your headphones on. Whereas the singer gets the benefit of the music, those unfortunate to be standing nearby are subjected to an unaccompanied (and invariably crappy) rendition of the song.
"I wish that guy would turn his iPod off - his a crapella version of Bohemian Rhapsody is killing me"
Crappy graphics. Can be exaggerated to as blinding or something that hurts your eyes after a while. It is usually applied to early developed games or simply, plain bad graphics.
In the videogame Sea of Thieves there is an island called "Rapier Cay", which for SoT players is widely known as "Rapist Capeist". Because of the size of the island most players tend to just drive their ships right over the middle of the island, whilst taking minor hits to the hull.
Arrthur: "Oh, I think I spotted Rapist Capeist, let's drive right over it."
Jarrshua: "Yeah great idea, we still need to burn our 217 planks from that fortress!"