I think My Gamer tag is funny haha
Not exactly a funny name, but when a name that was something to the effect of 'BlkLivesMatter' showed up in a lobby, the whole chat turned into a redneck re-enactment of Forrest Gump. You'd be surprised at how many types of shrimp people can name off during a BTB.
Back in Halo 3 I met someone with the gamertag of shotty2yabody. Needless to say they lived up to their name as we were playing shotty snipes and I got nailed around every corner by them.