1. 
   Screwing
   Screw'ing adjective & noun from Screw , transitive verb Screwing machine . See Screw machine , under Screw .
   Found op http://www.encyclo.co.uk/webster/S/39
   
   
2. 
   Screwing
   • (p. pr. & vb. n.) of Screw • a. & n. from Screw, v. t.
   Found op http://thinkexist.com/dictionary/meaning/screwing/
   
   
3. 
   screwing
   1) Ass 2) Carnal knowledge 3) Coition 4) Coitus 5) Congress 6) Copulation 7) Fouling (up) 8) Fuck 9) Fucking 10) Goofing, with 'up' 11) Intercourse 12) Nookie 13) Nooky 14) Piece of ass 15) Piece...
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/screwing/1
   
   

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