fuckling /ˈfʌk.lɪŋ/
Noun (slang, derogatory or humorous, informal)
1. The child or descendant of a single, divorced, or unwed parent.
2. An offspring resulting from a brief, non-committal, or casual sexual
relationship.
Etymology:
Derived from the vulgar verb
fuck + the diminutive/offspring-forming suffix -ling (as seen in words
like sibling, duckling, or foundling).