I believe that I just found this easter egg. It will most likely last for the rest of today (8/7) "Hold onto Yer butt" is written across the bomb. Heres a picture of the bomb:
Actually there are a couple other different phrases on the bomb as well, i think its random what phrase pops up.
Really? Because I'm pretty sure my bomb says 'Kiss it Goodbye'. And one time, I saw a Spartan Helmet with the peace sign next to it and then XOXO. But that's just me. A very old easter egg, although congrats on finding it yourself. Good job.
Yes there are other messages. Ive never seen anyone aware of this though... I believe that they only show up on the 7th of each month... Ive seen- Thus I refute thee (also on B.net stats for mele with bomb) Spartan helmet- someone said only after defusing a bomb Kiss me goodbye- said only when the bomb is armed.