I love the term
"SLF" cracks me up. Sometimes I ask when steerage class will be loading.
Every field has it's own terms that could cause umbrage to outsiders. Those who think that 'SLF' is insulting should stay well away from the inside conversations of cops (my brother has a lot of cop friends) and those of us in the medical field! Sometimes in medicine and law enforcement, if you don't laugh, you'll cry.