Here are some popular synonyms of 'penis' used in the US
(from condom slogans):
1. Cover your stump before you hump
2. Before you attack her, wrap your whacker
3. Don't be silly, protect your willy
4. When in doubt, shroud your spout
5. Don't be a loner, cover your boner
6. You can't go wrong if you shield your dong
7. If you're not going to sack it, go home and whack it
8. If you think she's spunky, cover your monkey
9. If you slip between her thighs, be sure to
condomize
10. It will be sweeter if you wrap your peter
11. She won't get sick if you wrap your dick
12. If you go into heat, package your meat
13. While you're undressing venus, dress up your penis
14. When you take off her pants and blouse, slip up your
trouser mouse
15. Especially in December, gift wrap your member
16. Never, never deck her with an unwrapped pecker
17. Don't be a fool, vulcanize your tool
18. The right selection will protect your erection
19. Wrap it in foil before
checking her oil
20. A crank with armor will never harm her
21. No glove, no love!
