I'm looking for ideas for derogatory names for Armsmen of the Imperial Navy. I'm writing background for the Armsmen of the Naval Battalions on board a squadron of three Imperial vessels. These battalions make up the ' 1st Black Talon Regiment (Navy) '. I think it would only be a small step to amalgamate a few naval battalions, which are known to exist, and call it a naval regiment either officially or unofficially. I'm looking for words that proper voidsmen might refer to these toy soldier wannabe's by.
I'm portraying the Naval Regiment to be more like the Royal Marines and Troupes de Marines of the 18th Century rather than their 21st Century equivalents, a professional body of troops (at least in this regiments case) specialised in boarding actions and repelling borders, likely the regiment would have its own battle honours separate from the Black Talons squadron as well. One of the major differences between the 1st Black Talon Regiment (Navy) and, say, the Royal Marines is that they are firmly and historically part of the Navy, they're not an Imperial Guard Regiment on permanent loan or anything like that and so use the Naval Rank structure (such as it is). I prefer this because even since the days of the Imperial Army and the first crusades the Navy has been subordinate to the ground pounders. I don't imagine the Navy finding this a particularly appealing idea, so having its own 'soldiers' (I hesitate to use the word Marines for obvious reasons) might be a better alternative.
I've looked into current terms used by some armed forces but none of work very well in this universe, and I certainly want to steer away from acronyms if I can help it. Any ideas and or comments would be appreciated.