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Good idea:

Dilf n.
An attractive, sexually appealing father. Formed by acronym.
[D.I.L.F. Acronym of ‘Dad I’d like to f**k.’]
"Wow, you’re dad is a D.I.L.F.”" -A female peer, on Tue Nov 30, 1999
This acronym originates from the one used in American Pie, ‘M.I.L.F.,’ which stands for ‘Mom I’d like to f**k.” Soon after this movie was release, ‘M.I.L.F.’ was used in conversation among teenager boys, and girls wanted a similar acronym that they could use in reference to good looking older men. Hence, the ‘mom’ of M.I.L.F. was replaced with ‘dad’ to form ‘D.I.L.F.’.

daqui