body in urethra
When a character is partially inside of another character's urethra, leaving their upper or lower body, feet or head, outside of the urethral opening.
Most cases of a character's body in another's urethra are related to cock vore, when a character is in the process of being swallowed by another character's penis. Far less commonly, this can involve a character being inserted or swallowed through the female urethra, located above the vaginal opening, this may be tagged as pussy urethra vore.
If a character is entirely or almost entirely within a penile urethra, use inside penis instead