younger male
A male character depicted with another character who is visibly/explicitly older than them; making that male character younger than the other character. Note that this tag does not indicate that the male character is young, this tag can apply to an adult male character who is younger than an older, mature or elderly adult.
For the opposite sex, see younger female, for the "opposite age", see older male
Age Difference Tags:
Older
A character that is older than another within the same scene. This doesn't mean the character is necessarily mature, middle aged, or elderly, these tags merely compare them to another character in the same image. If the character is middle aged use the appropriate mature_* tags, (see the mature section in "see also" below).
Younger
Related:
Mature
Mature describes characters that are "middle aged" - in human terms, this is generally around ages 45-65, however, this tag is more concerned with the visual appearance of the character rather than strict definitions of chronological age. If a mature character is in an image with a younger character, the post should also be tagged with the appropriate older_* and younger_* tags above.
See Also:
This tag implicates male, age_difference (learn more).