I like the the name "Thunderchickens," since its both imposing and silly at the same time (but more imposing, especially this year
).
Also, Cheesy Poofs.
I also think alternate team names, or team nicknames, are cool since it kind of gives a sense of closeness in FIRST. Take team 71 for example, their official team name is Team Hammond, but everybody knows which team I am referring to when I say Beatty.