gender fluid
Not strictly identifying as one distinct gender, perhaps identifying as a different gender at different times, or identifying as more than one gender at once. My sex is male, but I'm gender fluid, and I feel more feminine than masculine some days.
embalming fluid
1. Literally, a type of fluid that is used to preserve a corpse. ("Embalming" is the process of injecting a corpse with such fluid.) We haven't injected the embalming fluid yet—that's the next step.
2. slang Liquor, especially whiskey. If I keep drinking this embalming fluid, I'll be drunk in no time!