A word suggestion for the TF fandom: “slickware”.
Literal translation is “one who is easily aroused/one who lubricates easily”. It’s used to indicate someone who’s up for most things with most people, and is generally but not always used to mean someone who prefers to use their valve.
It’s roughly equivalent to “slut”, but carries none of the negative connotations. In fact, it’s often used in a more or less positive manner, and is a crude term of endearment among some people. It’s a crude term, but not generally considered to be an insult. The sort of person who can be referred to as slickware generally doesn’t mind crude terms. It could be used in a negative way depending on tone, but so can most words.
Blackspark has at least one friend who likes to greet him by shouting “YO, SLICKWARE” regardless of company. He finds this hilarious, and considers it more than accurate. He is up for most things with most people, regardless of species as long as it’s safe.
A similar term: “slickspike”. Refers to a spike mech who gets laid a lot. Implies that said slickness is someone else’s lubricant. Again, crude but neutral-to-positive. Can be used as a crude term of affection.
“Hey there Slick!” given a whole new meaning!
Oh, SO much new meaning. Probably a lot of snickering and/or scandalized looks from anyone who hears that particular human saying.
Some mechs probably pick it up, except with vocal undertones that may as well be about 20 wink emoticons. Oh, everybody knows what that means, except the oblivious humans who are just staring up at all this.